☆ 4.8 Article

Spontaneous time-reversal symmetry breaking in twisted double bilayer graphene

NATURE COMMUNICATIONS (2022)

Related references

Note: Only part of the references are listed.

Article Physics, Multidisciplinary

Bulk and edge properties of twisted double bilayer graphene

Yimeng Wang et al.

Summary: The discovery that twisted double bilayer graphene can exhibit both metallic edge transport and insulating bulk properties may be a signature of the predicted topological phase. Further characterization of the edge transport is necessary to confirm this finding.

NATURE PHYSICS (2022)

Add to Collection

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)

Add to Collection

Article Physics, Multidisciplinary

Berry curvature dipole senses topological transition in a moire superlattice

Subhajit Sinha et al.

Summary: The topological aspects of the electron wave function, including the Berry curvature and Chern number, play a crucial role in determining the physical properties of materials. Twisted double bilayer graphene offers a tunable system to study topological transitions and has potential applications in next-generation Berry-curvature-based memory devices. Furthermore, the strain-induced Berry curvature dipole can be used to detect topological transitions in the bands.

NATURE PHYSICS (2022)

Add to Collection

Article Physics, Multidisciplinary

Symmetry breaking in twisted double bilayer graphene

Minhao He et al.

Summary: The study reveals that spontaneous symmetry breaking plays a crucial role in the correlated insulating and metallic states in twisted double bilayer graphene, which can be tuned by both the twist angle and an external electric field. The metallic states exhibit abrupt drops in resistivity as temperature decreases, suggesting that spontaneous symmetry breaking is the origin of the abrupt resistivity drops, while nonlinear transport seems to be due to Joule heating. These findings imply that similar mechanisms may be relevant across a broader class of semiconducting flat band van der Waals heterostructures.

NATURE PHYSICS (2021)

Add to Collection

Article Multidisciplinary Sciences

Anomalous collapses of Nares Strait ice arches leads to enhanced export of Arctic sea ice

G. W. K. Moore et al.

Summary: Ice arches at the northern and southern ends of Nares Strait, a key passage in the Arctic, are forming for shorter durations, leading to increased ice transport and accelerating the export of multi-year ice.

NATURE COMMUNICATIONS (2021)

Add to Collection

Article Multidisciplinary Sciences

Quantum anomalous Hall octet driven by orbital magnetism in bilayer graphene

Fabian R. Geisenhof et al.

Summary: In this study, a state with a conductance of 2e(2)h(-1) in bilayer graphene was discovered, exhibiting magnetic hysteresis and QAH behavior driven by orbital magnetism that can be tuned via electric and magnetic fields. The observed octet of QAH phases in bilayer graphene displays peculiar ferrimagnetic and ferrielectric order characterized by quantized anomalous charge, spin, valley and spin-valley Hall behavior.

NATURE (2021)

Add to Collection

Article Multidisciplinary Sciences

Evidence for unconventional superconductivity in twisted bilayer graphene

Myungchul Oh et al.

Summary: Recent studies on magic-angle twisted bilayer graphene (MATBG) have shown that the superconductivity in MATBG may not be described by the conventional BCS theory, but rather resembles a non-BCS mechanism due to the large density of states in its flat bands. This suggests that the pairing mechanism in MATBG may be unconventional and different from that of conventional superconductors.

NATURE (2021)

Add to Collection

Article Multidisciplinary Sciences

Fractional Chern insulators in magic-angle twisted bilayer graphene

Yonglong Xie et al.

Summary: Fractional Chern insulators (FCIs) are lattice analogues of fractional quantum Hall states and have been recently observed in magic-angle twisted BLG at low magnetic field. The appearance of these states at 5 T is accompanied by the disappearance of nearby topologically trivial charge density wave states.

NATURE (2021)

Add to Collection

Article Chemistry, Multidisciplinary

Evidence of Orbital Ferromagnetism in Twisted Bilayer Graphene Aligned to Hexagonal Boron Nitride

Aaron L. Sharpe et al.

Summary: This study demonstrates a highly anisotropic ferromagnetism in twisted bilayer graphene, which is associated with a Chern insulating state. The anisotropy is likely orbital in nature rather than spin-induced, and a transition to a new phase may occur when an in-plane magnetic field exceeds 5 T.

NANO LETTERS (2021)

Add to Collection

Article Multidisciplinary Sciences

Imaging orbital ferromagnetism in a moire Chern insulator

C. L. Tschirhart et al.

Summary: Researchers have found that electrons in moire flat band systems can break time-reversal symmetry, leading to a quantized anomalous Hall effect, with magnetism primarily orbital in nature. The study also reveals a significant change in magnetization as the chemical potential crosses the quantum anomalous Hall gap, consistent with the expected contribution of chiral edge states to the magnetization in an orbital Chern insulator. Additionally, mapping the spatial evolution of field-driven magnetic reversal shows reproducible micrometer-scale domains pinned to structural disorder.

SCIENCE (2021)

Add to Collection

Article Multidisciplinary Sciences

Correlated electron-hole state in twisted double-bilayer graphene

Peter Rickhaus et al.

Summary: This study discovered a correlated electron-hole state in double-bilayer graphene twisted to 2.37 degrees, where moire states retain much of their isolated bilayer character. This allows the generation of an energetic overlap between narrow isolated electron and hole bands with good nesting properties, leading to the formation of ordered states with reconstructed Fermi surfaces consistent with a density-wave state that can be tuned without introducing chemical dopants.

SCIENCE (2021)

Add to Collection

Review Physics, Applied

Engineering symmetry breaking in 2D layered materials

Luojun Du et al.

Summary: Symmetry breaking plays a significant role in determining physical phenomena and quantum phase transitions in 2D materials. Engineering symmetry breaking of 2D materials offers opportunities to tune physical properties and introduce new physics and technological innovations. Various approaches have been developed to engineer symmetry breaking in 2D materials, leading to new perspectives on applications and physics.

NATURE REVIEWS PHYSICS (2021)

Add to Collection

Article Multidisciplinary Sciences

Intrinsic quantized anomalous Hall effect in a moire heterostructure

M. Serlin et al.

SCIENCE (2020)

Add to Collection

Article Multidisciplinary Sciences

U1 snRNP regulates cancer cell migration and invasion in vitro

Jung-Min Oh et al.

NATURE COMMUNICATIONS (2020)

Add to Collection

Article Multidisciplinary Sciences

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

Yuan Cao et al.

NATURE (2020)

Add to Collection

Article Physics, Multidisciplinary

Superconductivity and strong correlations in moire flat bands

Leon Balents et al.

NATURE PHYSICS (2020)

Add to Collection

Article Physics, Multidisciplinary

Correlated states in twisted double bilayer graphene

Cheng Shen et al.

NATURE PHYSICS (2020)

Add to Collection

Article Multidisciplinary Sciences

Tunable spin-polarized correlated states in twisted double bilayer graphene

Xiaomeng Liu et al.

NATURE (2020)

Add to Collection

Review Chemistry, Physical

Graphene bilayers with a twist

Eva Y. Andrei et al.

NATURE MATERIALS (2020)

Add to Collection

Article Physics, Multidisciplinary

Resonance Microwave Measurements of an Intrinsic Spin-Orbit Coupling Gap in Graphene: A Possible Indication of a Topological State

J. Sichau et al.

PHYSICAL REVIEW LETTERS (2019)

Add to Collection

Article Multidisciplinary Sciences

Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene

Aaron L. Sharpe et al.

SCIENCE (2019)

Add to Collection

Article Physics, Multidisciplinary

Correlated Insulating States in Twisted Double Bilayer Graphene

G. William Burg et al.

PHYSICAL REVIEW LETTERS (2019)

Add to Collection

Article Physics, Multidisciplinary

Gate-Tunable Topological Flat Bands in Trilayer Graphene Boron-Nitride Moire Superlattices

Bheema Lingam Chittari et al.

PHYSICAL REVIEW LETTERS (2019)

Add to Collection

Article Materials Science, Multidisciplinary

Nearly flat Chern bands in moire superlattices

Ya-Hui Zhang et al.

PHYSICAL REVIEW B (2019)

Add to Collection

Article Materials Science, Multidisciplinary

Flat bands in twisted double bilayer graphene

Narasimha Raju Chebrolu et al.

PHYSICAL REVIEW B (2019)

Add to Collection

Article Materials Science, Multidisciplinary

Band structure and topological properties of twisted double bilayer graphene

Mikito Koshino

PHYSICAL REVIEW B (2019)

Add to Collection

Article Multidisciplinary Sciences

Unconventional superconductivity in magic-angle graphene superlattices

Yuan Cao et al.

NATURE (2018)

Add to Collection

Article Multidisciplinary Sciences

Correlated insulator behaviour at half-filling in magic-angle graphene superlattices

Yuan Cao et al.

NATURE (2018)

Add to Collection

Article Multidisciplinary Sciences

Tunable moire bands and strong correlations in small-twist-angle bilayer graphene

Kyounghwan Kim et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2017)

Add to Collection

Article Chemistry, Multidisciplinary

van der Waals Heterostructures with High Accuracy Rotational Alignment

Kyounghwan Kim et al.

NANO LETTERS (2016)

Add to Collection

Article Physics, Multidisciplinary

Spin and valley quantum Hall ferromagnetism in graphene

A. F. Young et al.

NATURE PHYSICS (2012)

Add to Collection

Article Multidisciplinary Sciences

Moire bands in twisted double-layer graphene

Rafi Bistritzer et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2011)

Add to Collection

Article Physics, Multidisciplinary

Anomalous Hall effect

Naoto Nagaosa et al.

REVIEWS OF MODERN PHYSICS (2010)

Add to Collection

Article Materials Science, Multidisciplinary

Behavior of the electrical resistivity of MnSi at the ferromagnetic phase transition

Alla E. Petrova et al.

PHYSICAL REVIEW B (2006)

Add to Collection

Article Physics, Multidisciplinary

Quantum Hall ferromagnetism in graphene

Kentaro Nomura et al.

PHYSICAL REVIEW LETTERS (2006)

Add to Collection

Article Multidisciplinary Sciences

Experimental observation of the quantum Hall effect and Berry's phase in graphene

YB Zhang et al.

NATURE (2005)

Add to Collection

© Peeref 2019-2024. All rights reserved.