Fabrication, energy band engineering, and strong correlations of two-dimensional van der Waals moiré superlattices

Article Chemistry, Multidisciplinary

Moire Superlattice Effects and Band Structure Evolution in Near-30-Degree Twisted Bilayer Graphene

Matthew J. Hamer et al.

Summary: This study investigates the moire superlattice effects in large-angle twisted bilayer graphene (tBLG), revealing different mechanisms for the emergence of electronic minigaps and van Hove singularities.

ACS NANO (2022)

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Article Chemistry, Physical

Moire enhanced charge density wave state in twisted 1T-TiTe2/1T-TiSe2 heterostructures

Wei-Min Zhao et al.

Summary: The study reveals that moire patterns formed at specific twist angles can trap charge density wave (CDW) states, which persist at room temperature, indicating potential applications in CDW-based technologies.

NATURE MATERIALS (2022)

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Article Nanoscience & Nanotechnology

Interfacial ferroelectricity in rhombohedral-stacked bilayer transition metal dichalcogenides

Xirui Wang et al.

Summary: By stacking non-equilibrium configurations of van der Waals materials, we have successfully fabricated nanometer-thick 2D ferroelectric semiconductors. We discovered electrically switchable rhombohedral-stacking configurations by parallel stacking two identical monolayer transition metal dichalcogenides (TMDs), with out-of-plane polarization that can be flipped by in-plane sliding motion. The ferroelectric domains were visualized using piezoelectric force microscopy.

NATURE NANOTECHNOLOGY (2022)

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Article Multidisciplinary Sciences

Spin-orbit-driven ferromagnetism at half moire filling in magic-angle twisted bilayer graphene

Jiang-Xiazi Lin et al.

Summary: This study investigates the combined influence of strong electron correlation and spin-orbit coupling on a two-dimensional electronic system at the interface between twisted bilayer graphene and tungsten diselenide crystal. The research shows that strong electron correlation stabilizes correlated insulating states at different fillings within the moire flatband and spin-orbit coupling transforms these insulators into ferromagnetic materials. The coupling between spin and valley degrees of freedom can be controlled with a magnetic or electric field.

SCIENCE (2022)

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Article Chemistry, Multidisciplinary

Gap Opening in Double-Sided Highly Hydrogenated Free-Standing Graphene

Maria Grazia Betti et al.

Summary: By exposing fully free-standing nanoporous samples of graphene to atomic hydrogen in ultrahigh vacuum, the researchers achieved an unprecedented level of hydrogenation, converting conductive graphene into a wide gap semiconductor. The experimental results confirmed the theoretical predictions of a stable, double-sided fully hydrogenated configuration without pi states.

NANO LETTERS (2022)

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Article Chemistry, Multidisciplinary

Correlated States in Strained Twisted Bilayer Graphenes Away from the Magic Angle

Le Zhang et al.

Summary: Graphene bilayers can exhibit correlated states with flat bands even at twisting angles far from the magic angle. This discovery provides insight into the origins of correlated states and expands the possibilities for exploring correlated physics in Moire superlattices.

NANO LETTERS (2022)

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Article Chemistry, Physical

Domino-like stacking order switching in twisted monolayer-multilayer graphene

Shuai Zhang et al.

Summary: In this study, two metastable reconstruction states with distinct stacking orders and strain soliton structures were identified in small-angle twisted graphene using conductive atomic force microscopy. The switching mechanism between these two states was found to propagate spontaneously in a domino-like fashion. The fine structure of the bistable states is critical for understanding the unique properties of van der Waals structures with tiny twists.

NATURE MATERIALS (2022)

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Article Physics, Multidisciplinary

Isospin order in superconducting magic-angle twisted trilayer graphene

Xiaoxue Liu et al.

Summary: The discovery of magic-angle twisted trilayer graphene and its integration into a double-layer structure provides important insights into the properties and stability of the superconducting phase. The findings also contribute to the development of theoretical models aiming to understand the nature of superconductivity.

NATURE PHYSICS (2022)

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Article Multidisciplinary Sciences

Orderly disorder in magic-angle twisted trilayer graphene

Simon Turkel et al.

Summary: The magic-angle twisted trilayer graphene has shown a potential for engineering strongly correlated flat bands. Using low-temperature scanning tunneling microscopy, researchers have observed a strong reconstruction of the moire lattice in real trilayer samples, leading to the formation of localized twist-angle faults. These localized regions exhibit different electronic structures compared to the background regions, resulting in a doping-dependent, spatially granular electronic landscape.

SCIENCE (2022)

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Article Multidisciplinary Sciences

Spectroscopy signatures of electron correlations in a trilayer graphene/hBN moire superlattice

Jixiang Yang et al.

Summary: We report spectroscopy measurements of dual-gated TLG/hBN using Fourier transform infrared photocurrent spectroscopy and observe optical transitions and bandgap opening, providing insights into the electron correlation in TLG/hBN.

SCIENCE (2022)

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Article Nanoscience & Nanotechnology

A tunable bilayer Hubbard model in twisted WSe2

Yang Xu et al.

Summary: Twisting the AB-homobilayer of WSe2 enables the realization of bilayer Hubbard model in the weak interlayer hopping limit, leading to observation of competing electronic states transition.

NATURE NANOTECHNOLOGY (2022)

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Article Multidisciplinary Sciences

Isospin competitions and valley polarized correlated insulators in twisted double bilayer graphene

Le Liu et al.

Summary: This study observes the emergence of new correlated insulators from spin-polarized states to valley-polarized states in twisted double bilayer graphene. The results demonstrate a potential method to achieve isospin control and obtain new phases of matter in twisted multilayer systems.

NATURE COMMUNICATIONS (2022)

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Article Chemistry, Physical

Designed growth of large bilayer graphene with arbitrary twist angles

Can Liu et al.

Summary: This study develops an effective strategy to grow centimeter-scale twisted bilayer graphene with arbitrary twist angles. The accuracy and consistency of the twist angles are demonstrated through comprehensive characterization techniques. This research provides an accessible route for the designed growth of large-scale two-dimensional twisted bilayers, laying the material foundation for future applications in twistronics at the integration level.

NATURE MATERIALS (2022)

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Article Multidisciplinary Sciences

Giant ferroelectric polarization in a bilayer graphene heterostructure

Ruirui Niu et al.

Summary: At the interface of van der Waals heterostructures, an unprecedented ferroelectric polarization has been observed in a Bernal bilayer graphene moire superlattice encapsulated by twisted boron nitride flakes. This ferroelectric polarization has a high charge density and can be controlled by adjusting the gate. Moreover, this ferroelectric switching can also be applied to other properties.

NATURE COMMUNICATIONS (2022)

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Article Multidisciplinary Sciences

Van der Waals heterostructures

Andres Castellanos-Gomez et al.

Summary: The integration of dissimilar materials into heterostructures has become a powerful tool for engineering interfaces and electronic structure. This Primer provides an overview of state-of-the-art methodologies for producing van der Waals heterostructures, focusing on top-down assembly and bottom-up synthesis, and discusses future opportunities for their continued development.

NATURE REVIEWS METHODS PRIMERS (2022)

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Article Physics, Multidisciplinary

Electrically tunable correlated and topological states in twisted monolayer-bilayer graphene

Shaowen Chen et al.

Summary: Twisted monolayer-bilayer graphene (tMBG) systems exhibit various correlated metallic and insulating states, as well as topological magnetic states. The phase diagram of tMBG can be switched under different perpendicular electric fields, providing a tunable platform for investigating correlated and topological states.

NATURE PHYSICS (2021)

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Article Multidisciplinary Sciences

Topological flat bands in twisted trilayer graphene

Zhen Ma et al.

Summary: Twisted trilayer graphene is a simple realistic system with flat bands and nontrivial topology, making it an ideal platform for studying strongly correlated physics. The band structures of twisted TLG are influenced by the twist angle and perpendicular electric field, resulting in unique correlated states compared to other graphene structures.

SCIENCE BULLETIN (2021)

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Article Chemistry, Multidisciplinary

Engineering Thermal Transport across Layered Graphene-MoS2 Superlattices

Aditya Sood et al.

Summary: Layering two-dimensional van der Waals materials provides control over atomic placement, influencing vibrational spectra and heat flow. Experimental and simulation studies reveal the design rules for cross-plane heat transport in superlattices assembled from graphene and MoS2 monolayers, demonstrating the importance of vibrational mismatch, interlayer adhesion, and junction asymmetry. An ultra-low effective cross-plane thermal conductivity superlattice is successfully achieved through these design rules.

ACS NANO (2021)

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Article Chemistry, Multidisciplinary

Van der Waals Nanowires with Continuously Variable Interlayer Twist and Twist Homojunctions

Peter Sutter et al.

Summary: This study reports the realization of tunable twist in germanium(II) sulfide van der Waals nanowires, and presents a local spectroscopic method for detecting twist effects.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Review Chemistry, Multidisciplinary

2D Polarized Materials: Ferromagnetic, Ferrovalley, Ferroelectric Materials, and Related Heterostructures

Junwei Chu et al.

Summary: The emergence of 2D polarized materials has demonstrated unique quantum behaviors at atomic scales and their applications in information storage and processing have developed significantly in recent years. This review focuses on the basic 2D polarized materials system and their applications in spintronics, valleytronics, and electronics, highlighting the underlying physical mechanisms, symmetry broken theory, and modulation process through heterostructure engineering. These summarized works will continue to enrich the understanding of 2D quantum systems and promising practical applications.

ADVANCED MATERIALS (2021)

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Article Physics, Multidisciplinary

Stronger Interlayer Interactions Contribute to Faster Hot Carrier Cooling of Bilayer Graphene under Pressure

Kun Ni et al.

Summary: Through experiments and simulations, researchers have revealed the significant contributions of interlayer shear and breathing modes coupled with in-plane vibration modes to the faster hot-carrier relaxations in bilayer graphene under pressure. This study highlights the importance of understanding the effect of interlayer interaction on the behaviors of electrons and phonons for tailoring the photocarrier dynamic properties of bilayer graphene.

PHYSICAL REVIEW LETTERS (2021)

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Article Multidisciplinary Sciences

Charge-polarized interfacial superlattices in marginally twisted hexagonal boron nitride

C. R. Woods et al.

Summary: This study observes ferroelectric-like domains in hexagonal boron nitride crystals stacked at small twist angles, attributed to interfacial elastic deformations creating out-of-plane dipoles formed by pairs of boron and nitrogen atoms. This discovery opens up new possibilities for designing van der Waals heterostructures and offers an alternative probe for studying moire-superlattice electrostatic potentials.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary

Coherent Electronic Band Structure of TiTe2/TiSe2 Moire Bilayer

Meng-Kai Lin et al.

Summary: The van der Waals bonded moire bilayer formed by sequential growth of TiSe2 and TiTe2 monolayers exhibits emergent electronic structure, as evidenced by angle-resolved photoemission band mapping. Despite the lack of translational symmetry and incommensurate lattice constants, sharp dispersive bands are observed, indicating distinct dispersion relations from those of the component monolayers alone. Theoretical calculations show the formation of composite bands through coherent electronic coupling despite weak interlayer bonding, leading to band renormalization and energy shifts.

ACS NANO (2021)

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Article Chemistry, Multidisciplinary

Tailoring the Band Structure of Twisted Double Bilayer Graphene with Pressure

Balint Szentpeteri et al.

Summary: Twisted two-dimensional structures provide new possibilities for band structure engineering, with flat bands emerging at magic twist angles, driving progress in strongly correlated physics. In twisted double bilayer graphene, dual gating allows for changes in Fermi level, electron density, and interlayer potential, offering further band gap control. By applying hydrostatic pressure, additional band structure control is enabled through changes in tunnel couplings between layers, leading to significant alterations in flat bands and gaps under pressures up to 2 GPa, consistent with theoretical simulations. Moreover, measurements suggest that a topologically nontrivial band gap opens at the charge neutrality point with zero displacement field in finite magnetic field due to pressure.

NANO LETTERS (2021)

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Article Chemistry, Multidisciplinary

Spontaneous Folding Growth of Graphene on h-BN

Xiaodong Fan et al.

Summary: A novel growth mode of graphene with spontaneous folding on h-BN substrate was reported, demonstrating the stability and potential applications of bilayer graphene with folded edges. This finding provides a new route for designing graphene devices with a new folding dimension.

NANO LETTERS (2021)

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Article Multidisciplinary Sciences

Localization of lattice dynamics in low-angle twisted bilayer graphene

Andreij C. Gadelha et al.

Summary: The twisted bilayer graphene undergoes self-organized lattice reconstruction, resulting in the formation of a superlattice that modulates vibrational and electronic structures, leading to phenomena such as strong correlations and superconductivity. Although experimental techniques and theoretical models face challenges in observing and describing these effects, nano-Raman spectroscopy can localize some vibrational modes and provide insights into the effects of electron-phonon coupling on the material properties.

NATURE (2021)

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Article Multidisciplinary Sciences

Tunable strongly coupled superconductivity in magic-angle twisted trilayer graphene

Jeong Min Park et al.

Summary: Moire superlattices have become a platform for studying correlated physics and superconductivity with unprecedented tunability. This study on magic-angle twisted trilayer graphene reveals a better tunability of electronic structure and superconducting properties than magic-angle twisted bilayer graphene, with implications for the understanding of strongly coupled superconductivity. The results suggest that the system can be electrically tuned close to the crossover to a two-dimensional Bose-Einstein condensate, indicating the potential for revolutionizing applications of superconductivity.

NATURE (2021)

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Article Multidisciplinary Sciences

Electric field-tunable superconductivity in alternating-twist magic-angle trilayer graphene

Zeyu Hao et al.

Summary: By constructing a van der Waals heterostructure with three stacked graphene layers at alternating twist angles, researchers observed tunable superconductivity at a specific twist angle. The superconducting regions are associated with flavor polarization of moire bands and are bounded by a van Hove singularity at high displacement fields, indicating unconventional moire superconductivity.

SCIENCE (2021)

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Article Multidisciplinary Sciences

Correlated states in doubly-aligned hBN/graphene/hBN heterostructures

Xingdan Sun et al.

Summary: The formation of interfacial moire superlattices in van der Waals vertical assemblies reconstructs crystal symmetry and provides opportunities for investigating exotic quantum states. The alignment of graphene monolayer to both top and bottom encapsulating hexagonal boron nitride leads to observed conductivity minima and correlated insulating states in a weak-interaction regime. The alignment of three 2D nanosheets leads to the formation of super-moire atomic lattices, influencing the electronic properties of van der Waals structures.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary

Fermi Velocity Reduction of Dirac Fermions around the Brillouin Zone Center in In2Se3-Bilayer Graphene Heterostructures

Zhenyu Wang et al.

Summary: This study reports the realization of moire Dirac cones in a monolayer In2Se3/bilayer graphene heterostructure, showing direct observation of Fermi velocity reduction and suggesting strong In2Se3/graphene interlayer coupling.

ADVANCED MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Unveiling Atomic-Scale Moire′Features and Atomic Reconstructions in High-Angle Commensurately Twisted Transition Metal Dichalcogenide Homobilayers

Xiaoxu Zhao et al.

Summary: Recent research has focused on twisting the angle between van der Waals stacked 2D layers to tune the physical properties of materials. Through advanced imaging techniques and theoretical calculations, new insights have been gained into the unique moire features and periodic lattice strain in commensurately twisted transition metal dichalcogenide (TMD) bilayers. These findings suggest that stacked variants in twisted bilayer systems exhibit similar electronic structures, indicating invariance against interlayer gliding.

NANO LETTERS (2021)

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Article Chemistry, Multidisciplinary

Imaging Graphene Moire Superlattices via Scanning Kelvin Probe Microscopy

Junxi Yu et al.

Summary: By studying graphene with ABAB and ABCA stacking, it was found that the surface potential of ABCA regions is approximately 15 mV higher than that of ABAB regions, due to stacking-dependent electronic structure. The moire superlattice visualized by LPFM can change with time, while imaging the surface potential distribution via SKPM appears more stable for mapping ABAB and ABCA regions.

NANO LETTERS (2021)

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Article Chemistry, Multidisciplinary

Mapping Modified Electronic Levels in the Moire Patterns in MoS2/WSe2 Using Low-Loss EELS

Sandhya Susarla et al.

Summary: In this study, the effect of twist angle on interlayer interaction in MoS2/WSe2 heterostructures is explored using high-resolution microscopy techniques. The research found that there is a weaker interaction between layers at higher twist angles (>5 degrees) and a stronger interaction at lower twist angles. Optical response of the heterostructure varies within the moire supercell, with lower energy absorption peak appearing in regions with AA stacking.

NANO LETTERS (2021)

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Article Multidisciplinary Sciences

Entropic evidence for a Pomeranchuk effect in magic-angle graphene

Asaf Rozen et al.

Summary: The study reveals a transition from a low-entropy electronic liquid to a high-entropy correlated state in magic-angle twisted bilayer graphene under the influence of electron density, temperature, and magnetic field. The correlated state demonstrates a unique combination of properties associated with itinerant electrons and localized moments, with distinct energy scales for different characteristics. The hybrid nature of the correlated state and the separation of energy scales have significant implications for the thermodynamic and transport properties of twisted bilayer graphene.

NATURE (2021)

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Article Multidisciplinary Sciences

Isospin Pomeranchuk effect in twisted bilayer graphene

Yu Saito et al.

Summary: The study explores the finite-temperature dynamics of spin and valley isospins in magic-angle twisted bilayer graphene, revealing a resistivity peak at high temperatures near a superlattice filling factor of -1, suggesting a Pomeranchuk-type mechanism. The data indicate the presence of a finite-field magnetic phase transition and a small isospin stiffness in the system.

NATURE (2021)

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Article Chemistry, Multidisciplinary

Large magnetic exchange coupling in rhombus-shaped nanographenes with zigzag periphery

Shantanu Mishra et al.

Summary: Nanographenes with zigzag edges are predicted to exhibit non-trivial pi-magnetism, but their magnetic stability has been limited by weak exchange coupling. Recent synthesis of two large rhombus-shaped nanographenes on gold and copper surfaces shows a significant magnetic exchange coupling.

NATURE CHEMISTRY (2021)

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Article Chemistry, Physical

Strain fields in twisted bilayer graphene

Nathanael P. Kazmierczak et al.

Summary: Twisted bilayer graphene exhibits two-regime reconstruction mechanics based on twist angle, with applied heterostrain accumulating anisotropically in saddle-point regions to generate distinctive striped strain phases. Nanoscale spatial fluctuations in twist angle and uniaxial heterostrain were statistically evaluated, revealing the prevalence of short-range disorder in moire heterostructures. This study provides insights into the twist-angle-dependent electronic behavior and structural relaxation, disorder, and strain in moire materials.

NATURE MATERIALS (2021)

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Article Multidisciplinary Sciences

Embedding atomic cobalt into graphene lattices to activate room-temperature ferromagnetism

Wei Hu et al.

Summary: Embedding Cobalt atoms in graphene lattice can achieve robust room-temperature ferromagnetism, facilitated by the formation of square-planar Co-N-4 moieties and local magnetic moments provided by atomically dispersed Co atoms.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Visualizing delocalized correlated electronic states in twisted double bilayer graphene

Canxun Zhang et al.

Nature Communications (2021)

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Article Multidisciplinary Sciences

Hetero-site nucleation for growing twisted bilayer graphene with a wide range of twist angles

Luzhao Sun et al.

Summary: The authors developed a chemical vapor deposition method for synthesizing twisted bilayer graphene with controllable angles. By employing a hetero-site nucleation strategy, they successfully prepared bilayer graphene with twist angles ranging from 0 degrees to 30 degrees, demonstrating high-quality and improved performance for potential applications in fundamental research and practical use.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary

Large-Scale Mapping of Moire Superlattices by Hyperspectral Raman Imaging

Kai-Qiang Lin et al.

Summary: Low-frequency Raman scattering can detect atomic reconstruction and map out the inhomogeneity of moire lattice in twisted-bilayer transition-metal dichalcogenides. This method provides a way to study the emerging electrical and optical properties in moire superlattices.

ADVANCED MATERIALS (2021)

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Article Multidisciplinary Sciences

Superconductivity in rhombohedral trilayer graphene

Haoxin Zhou et al.

Summary: This text introduces a study on achieving superconductivity in structurally simple graphene materials. The research found two distinct superconducting regions in structurally metastable crystalline rhombohedral trilayer graphene, providing a model system to test competing theoretical models of superconductivity.

NATURE (2021)

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Article Multidisciplinary Sciences

Pauli-limit violation and re-entrant superconductivity in moire graphene

Yuan Cao et al.

Summary: The study of magic-angle twisted trilayer graphene has revealed unexpectedly strong superconductivity, surpassing the conventional Pauli limit. The results suggest that external magnetic fields can induce transitions between phases with potentially different order parameters.

NATURE (2021)

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Article Physics, Multidisciplinary

Emulating Heavy Fermions in Twisted Trilayer Graphene

Aline Ramires et al.

Summary: Twisted trilayer graphene can emulate heavy fermion physics by hosting extended and localized modes that can be controlled by interlayer bias. In the presence of interactions, local moments are developed and Kondo coupled to coexisting extended states. By electrically controlling the exchange between local moments, the system can transition from a magnetic to heavy fermion regime, allowing exploration of a generalized Doniach phase diagram.

PHYSICAL REVIEW LETTERS (2021)

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Article Multidisciplinary Sciences

Stacking-engineered ferroelectricity in bilayer boron nitride

Kenji Yasuda et al.

Summary: In this research, ferroelectricity is achieved in two-dimensional boron nitride through van der Waals assembly, demonstrating the phenomenon that polarization can be changed by twisting the angle. This discovery paves the way for potential applications in ultrathin nonvolatile memory, while maintaining the high mobility of graphene.

SCIENCE (2021)

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Article Multidisciplinary Sciences

Interfacial ferroelectricity by van der Waals sliding

M. Vizner Stern et al.

Summary: In this study, a stable ferroelectric order was discovered at the interface between two naturally grown flakes of hexagonal boron nitride, where the flakes were stacked in a non-centrosymmetric parallel orientation. Reversible polarization switching coupled with lateral sliding was achieved by scanning a biased tip above the surface.

SCIENCE (2021)

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Article Multidisciplinary Sciences

Strong interaction between interlayer excitons and correlated electrons in WSe2/WS2 moire superlattice

Shengnan Miao et al.

Summary: Heterobilayers of transition metal dichalcogenides host moire superlattices that give rise to strong electron interactions. The study shows that increasing optical excitation power can amplify the photoluminescence of interlayer excitons and enhance valley polarization due to reduced mobility in certain correlated insulating states.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Competing correlated states and abundant orbital magnetism in twisted monolayer-bilayer graphene

Minhao He et al.

Summary: The research uncovers a rich correlated phase diagram in twisted monolayer-bilayer graphene and identifies a new insulating state that can be explained by intervalley coherence with broken time reversal symmetry through electrical transport measurements.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Lattice reconstruction induced multiple ultra-flat bands in twisted bilayer WSe2

En Li et al.

Summary: The authors demonstrate the emergence of multiple ultra-flat electronic bands in twisted bilayer WSe2 using scanning tunneling microscopy and spectroscopy, indicating the potential for further study of exotic correlated phases in TB-TMDs.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary

Moire patterns of twisted bilayer antimonene and their structural and electronic transition

Qi An et al.

Summary: The study investigates the structural reconstruction and electronic transition in moire patterns of twisted bilayer antimonene, revealing that atomic relaxation leads to the formation of high-symmetry stacking domains with soliton boundaries through a vortex-like reconstruction. As the twist angle increases, the impact of structural reconstruction on the electronic bands becomes significant, leading to the appearance of flat bands without the need for a specific magic angle.

NANOSCALE (2021)

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Article Multidisciplinary Sciences

Intrinsic toughening and stable crack propagation in hexagonal boron nitride

Yingchao Yang et al.

Summary: This study discovered the high fracture toughness of single-crystal monolayer h-BN, contrary to expectations, enabling stable crack propagation through crack deflection and branching to enhance material toughness. This provides new technological opportunities and applications for monolayer h-BN.

NATURE (2021)

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Article Chemistry, Multidisciplinary

Emerging flat bands in large-angle twisted bi-layer graphene under pressure

Liangbing Ge et al.

Summary: Recent research has shown that under pressure, large-angle twisted bi-layer graphene can exhibit flat bands near the Fermi level, potentially inducing properties such as superconductivity found in smaller-angle twisted bi-layer graphene at ambient pressure. The Fermi velocity is found to decrease monotonically with increasing pressure for large twisted angles.

NANOSCALE (2021)

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Article Chemistry, Multidisciplinary

Understanding Interlayer Contact Conductance in Twisted Bilayer Graphene

Zhiwei Yu et al.

SMALL (2020)

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Article Chemistry, Multidisciplinary

Interlayer Decoupling in 30° Twisted Bilayer Graphene Quasicrystal

Bing Deng et al.

ACS NANO (2020)

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Article Chemistry, Multidisciplinary

Moire Flat Bands in Twisted Double Bilayer Graphene

Fatemeh Haddadi et al.

NANO LETTERS (2020)

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Article Multidisciplinary Sciences

Tunable correlated Chern insulator and ferromagnetism in a moire superlattice

Guorui Chen et al.

NATURE (2020)

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Article Multidisciplinary Sciences

Intrinsic quantized anomalous Hall effect in a moire heterostructure

M. Serlin et al.

SCIENCE (2020)

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One-dimensional flat bands in twisted bilayer germanium selenide

D. M. Kennes et al.

NATURE COMMUNICATIONS (2020)

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Large-area, periodic, and tunable intrinsic pseudo-magnetic fields in low-angle twisted bilayer graphene

Haohao Shi et al.

NATURE COMMUNICATIONS (2020)

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Article Chemistry, Multidisciplinary

Twist Angle-Dependent Atomic Reconstruction and Moire Patterns in Transition Metal Dichalcogenide Heterostructures

Matthew R. Rosenberger et al.

ACS NANO (2020)

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Article Multidisciplinary Sciences

Precise control of the interlayer twist angle in large scale MoS2 homostructures

Mengzhou Liao et al.

NATURE COMMUNICATIONS (2020)

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Article Chemistry, Multidisciplinary

30°-Twisted Bilayer Graphene Quasicrystals from Chemical Vapor Deposition

Sergio Pezzini et al.

NANO LETTERS (2020)

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Simulation of Hubbard model physics in WSe2/WS2 moire superlattices

Yanhao Tang et al.

NATURE (2020)

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Mott and generalized Wigner crystal states in WSe2/WS2 moire superlattices

Emma C. Regan et al.

NATURE (2020)

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Tunable correlated states and spin-polarized phases in twisted bilayer-bilayer graphene

Yuan Cao et al.

NATURE (2020)

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Article Nanoscience & Nanotechnology

Atomic reconstruction in twisted bilayers of transition metal dichalcogenides

Astrid Weston et al.

NATURE NANOTECHNOLOGY (2020)

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Article Optics

Strong mid-infrared photoresponse in small-twist-angle bilayer graphene

Bingchen Deng et al.

NATURE PHOTONICS (2020)

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Article Physics, Multidisciplinary

Correlated states in twisted double bilayer graphene

Cheng Shen et al.

NATURE PHYSICS (2020)

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Article Chemistry, Multidisciplinary

Flat Bands and Mechanical Deformation Effects in the Moire Superlattice of MoS2-WSe2 Heterobilayers

Dacen Waters et al.

ACS NANO (2020)

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Article Chemistry, Multidisciplinary

Observation of Electrically Tunable van Hove Singularities in Twisted Bilayer Graphene from NanoARPES

Alfred J. H. Jones et al.

ADVANCED MATERIALS (2020)

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Article Multidisciplinary Sciences

Topological polaritons and photonic magic angles in twisted α-MoO3bilayers

Guangwei Hu et al.

NATURE (2020)

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Tunable spin-polarized correlated states in twisted double bilayer graphene

Xiaomeng Liu et al.

NATURE (2020)

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Superconductivity in metallic twisted bilayer graphene stabilized by WSe2

Harpreet Singh Arora et al.

NATURE (2020)

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Untying the insulating and superconducting orders in magic-angle graphene

Petr Stepanov et al.

NATURE (2020)

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Article Chemistry, Physical

Correlated electronic phases in twisted bilayer transition metal dichalcogenides

Lei Wang et al.

NATURE MATERIALS (2020)

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Article Nanoscience & Nanotechnology

Visualization of moire superlattices

Leo J. McGilly et al.

NATURE NANOTECHNOLOGY (2020)

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Article Nanoscience & Nanotechnology

Broken mirror symmetry in excitonic response of reconstructed domains in twisted MoSe2/MoSe2bilayers

Jiho Sung et al.

NATURE NANOTECHNOLOGY (2020)

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Article Multidisciplinary Sciences

Supertwisted spirals of layered materials enabled by growth on non-Euclidean surfaces

Yuzhou Zhao et al.

SCIENCE (2020)

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In situ nanoscale imaging of moire superlattices in twisted van der Waals heterostructures

Yue Luo et al.

NATURE COMMUNICATIONS (2020)

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Article Chemistry, Multidisciplinary

Direct Bandgap-like Strong Photoluminescence from Twisted Multilayer MoS2 Grown on SrTiO3

Soumya Sarkar et al.

ACS NANO (2020)

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Article Multidisciplinary Sciences

Electrical switching of magnetic order in an orbital Chern insulator

H. Polshyn et al.

NATURE (2020)

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Unconventional ferroelectricity in moire heterostructures

Zhiren Zheng et al.

NATURE (2020)

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Abnormal conductivity in low-angle twisted bilayer graphene

Shuai Zhang et al.

SCIENCE ADVANCES (2020)

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Correlated insulating states at fractional fillings of moire superlattices

Yang Xu et al.

NATURE (2020)

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Article Chemistry, Physical

Interaction effects and superconductivity signatures in twisted double-bilayer WSe2

Liheng An et al.

NANOSCALE HORIZONS (2020)

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Article Chemistry, Physical

Integration of graphene and two-dimensional ferroelectrics: properties and related functional devices

Xin Jin et al.

NANOSCALE HORIZONS (2020)

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Article Materials Science, Multidisciplinary

Origin and evolution of ultraflat bands in twisted bilayer transition metal dichalcogenides: Realization of triangular quantum dots

Mit H. Naik et al.

PHYSICAL REVIEW B (2020)

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Observation of moire excitons in WSe2/WS2 heterostructure superlattices

Chenhao Jin et al.

NATURE (2019)

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Tuning superconductivity in twisted bilayer graphene

Matthew Yankowitz et al.

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Maximized electron interactions at the magic angle in twisted bilayer graphene

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Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene

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Correlated Insulating States in Twisted Double Bilayer Graphene

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Electronic Spectrum of Twisted Graphene Layers under Heterostrain

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Quasicrystalline 30 degrees twisted bilayer graphene as an incommensurate superlattice with strong interlayer coupling

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Fabrication, energy band engineering, and strong correlations of two-dimensional van der Waals moiré superlattices

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