4.8 Article

Electrically tunable dipolar interactions between layer-hybridized excitons

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Materials Science, Multidisciplinary

Electrical tuning of moire excitons in MoSe2 bilayers

Joakim Hagel et al.

Summary: Recent advancements in vertically stacked 2D materials have unveiled a diverse exciton landscape. Specifically, the use of out-of-plane electrical fields has been shown to manipulate the spectral position of interlayer excitons. However, the connection between twist-angle dependent hybridization and field-induced energy shifts has remained unclear. In this study, we explore the interplay of electrical and twist-angle tuning of moire excitons in MoSe2 homobilayers and provide insights into experimentally accessible methods to control moire exciton physics in atomically thin nanomaterials.

2D MATERIALS (2023)

Article Chemistry, Multidisciplinary

Ultrafast Nanoscopy of High-Density Exciton Phases in WSe2

Thomas Siday et al.

Summary: This study demonstrates the Mott transition from an exciton gas to an electron-hole plasma in two-dimensional transition metal dichalcogenides. Using ultrafast polarization nanoscopy, the researchers observed the transition of dark exciton recombination from monomolecular to bimolecular as the carrier density increased. Their results provide direct evidence of the strong inhomogeneity in stacked monolayers.

NANO LETTERS (2022)

Article Optics

Excitonic transport driven by repulsive dipolar interaction in a van der Waals heterostructure

Zhe Sun et al.

Summary: Studies have shown that repulsive dipolar interactions significantly affect the dynamics of excitons in dilute systems, modifying the diffusion transport of excitons and enhancing the diffusion coefficient. By combining these interactions with electrical control techniques, new opportunities for excitonic devices are presented.

NATURE PHOTONICS (2022)

Review Nanoscience & Nanotechnology

Excitonic devices with van der Waals heterostructures: valleytronics meets twistronics

Alberto Ciarrocchi et al.

Summary: 2D semiconducting transition metal dichalcogenides are a promising class of materials that have unique properties, including large exciton binding energies. The ability to control interlayer excitons in van der Waals heterostructures provides opportunities for spin and valley degree of freedom manipulation in solid-state devices. This review discusses recent progress in device architectures and engineering techniques for tailored properties of interlayer excitons.

NATURE REVIEWS MATERIALS (2022)

Article Chemistry, Physical

An ultrafast photodetector driven by interlayer exciton dissociation in a van der Waals heterostructure

Edoardo Lopriore et al.

Summary: Researchers propose a novel device concept based on vertical heterojunctions of transition metal dichalcogenides, which offers a high trade-off between speed and responsivity, along with zero dark current. Their simulation approach demonstrates excellent predictive capabilities in investigating the physics of interlayer exciton transport.

NANOSCALE HORIZONS (2022)

Article Chemistry, Multidisciplinary

Disentangling Many-Body Effects in the Coherent Optical Response of 2D Semiconductors

Chiara Trovatello et al.

Summary: In this study, transient optical response of single-layer WS2 was measured using ultrashort laser pulses, and the effects of many-body interactions and Coulomb correlations on excitonic resonances were analyzed. It was found that resonant photoexcitation caused a blue shift of the A exciton, while above resonance photoexcitation resulted in a reduction of the exciton oscillator strength dominating the transient response at the optical bandgap.

NANO LETTERS (2022)

Article Multidisciplinary Sciences

Formation of moire interlayer excitons in space and time

David Schmitt et al.

Summary: Moire superlattices in van der Waals heterostructures can generate interlayer excitons with unique physical properties. By using femtosecond photoemission momentum microscopy, the formation mechanism and wavefunction distribution of interlayer excitons are quantitatively studied, providing insights for the investigation of correlated moire and exciton physics.

NATURE (2022)

Review Nanoscience & Nanotechnology

Semiconductor moire materials

Kin Fai Mak et al.

Summary: This article elaborates on the recent developments and future opportunities and challenges in fundamental research on semiconductor moire materials, with a particular focus on transition metal dichalcogenides.

NATURE NANOTECHNOLOGY (2022)

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)

Article Materials Science, Multidisciplinary

Exciton transport in a moire potential: From hopping to dispersive regime

Willy Knorr et al.

Summary: This work investigates the propagation of excitons in twisted TMD bilayers using a microscopic approach, showing that there is a transition from a hopping regime to a dispersive regime depending on the twist angle, which has significant implications for exciton propagation.

PHYSICAL REVIEW MATERIALS (2022)

Article Multidisciplinary Sciences

Extended Bose-Hubbard model with dipolar excitons

C. Lagoin et al.

Summary: The Hubbard model is a celebrated theoretical framework in condensed-matter physics. This study implements the extended Bose-Hubbard Hamiltonian by confining semiconductor dipolar excitons in an artificial two-dimensional square lattice, showcasing the characteristic features of checkerboard spatial order.

NATURE (2022)

Article Nanoscience & Nanotechnology

Exciton optics, dynamics, and transport in atomically thin semiconductors

Raul Perea-Causin et al.

Summary: This Research Update reviews the recent progress in understanding exciton optics, dynamics, and transport in atomically thin semiconductors, specifically transition metal dichalcogenide (TMD) monolayers. The impact of hexagonal boron nitride-encapsulation and breakthroughs in exciton-polaritonics are highlighted. Direct observations of exciton formation and thermalization in TMD monolayers and heterostructures, as well as the influence of exciton density, strain, and dielectric environment on exciton diffusion and funneling, are discussed. Relevant research directions for the near future in the field of atomically thin semiconductors are also proposed.

APL MATERIALS (2022)

Article Materials Science, Multidisciplinary

Microscopic origin of anomalous interlayer exciton transport in van der Waals heterostructures

Daniel Erkensten et al.

Summary: Van der Waals heterostructures provide a platform for studying many-body quantum phenomena. In this study, a microscopic theory for interlayer exciton-exciton interactions is developed, taking into account the dipolar nature of interlayer excitons and their fermionic substructure. It is found that these interactions result in nonlinear exciton propagation in the MoSe2 - WSe2 heterostructure. The propagation can be controlled by changing the number of hBN spacers or adjusting the dielectric environment. Surprisingly, it is revealed that interlayer excitons in freestanding samples propagate slower than excitons in hBN-encapsulated TMDs due to enhanced Coulomb drift with stronger environmental screening.

PHYSICAL REVIEW MATERIALS (2022)

Article Materials Science, Multidisciplinary

Excitonic Tonks-Girardeau and charge density wave phases in monolayer semiconductors

Rafal Oldziejewski et al.

Summary: Excitons in atomically thin transition-metal dichalcogenides confined to a one-dimensional geometry undergo a crossover from a Tonks-Girardeau to a charge density wave regime. Realistic system parameters are taken into account to predict the effective exciton-exciton interaction potential, showing key signatures of many-body crossover even at small exciton numbers. Photoluminescence spectra are found to provide accessible experimental fingerprints of strongly correlated quantum many-body states.

PHYSICAL REVIEW B (2022)

Article Materials Science, Multidisciplinary

Stacking-dependent exciton multiplicity in WSe2 bilayers

Zhijie Li et al.

Summary: This study investigates the optical characteristics of WSe2 homobilayers with different stackings and uncovers the role of layer stacking in the spectral multiplicity and phonon sidebands. The findings provide insights for the study of other layered semiconductor systems.

PHYSICAL REVIEW B (2022)

Article Materials Science, Multidisciplinary

Moire-Bose-Hubbard model for interlayer excitons in twisted transition metal dichalcogenide heterostructures

Niclas Goetting et al.

Summary: In bilayers of semiconducting transition metal dichalcogenides, the twist angle between layers can introduce a periodic potential modulation, leading to correlated states of excitons. The transition between Mott and extended exciton phases is explored using a moire-Bose-Hubbard Hamiltonian, with parameters obtained from Wannier representation and a nonlocal Rytova-Keldysh model for dielectric screening. The predicted emergence of Mott-insulating states in this system suggests the potential of twisted transition metal dichalcogenide heterostructures as quantum simulators.

PHYSICAL REVIEW B (2022)

Article Materials Science, Multidisciplinary

Spatially indirect intervalley excitons in bilayer WSe2

Zhiheng Huang et al.

Summary: In this study, three types of spatially indirect excitons and their quantum-confined Stark effects in bilayer WSe2 were discovered through electric field-tunable photoluminescence measurements. It was demonstrated, through first-principles calculations, that these excitons are momentum indirect and exhibit highly tunable circular polarization.

PHYSICAL REVIEW B (2022)

Article Multidisciplinary Sciences

Strongly correlated excitonic insulator in atomic double layers

Liguo Ma et al.

Summary: This study demonstrates a strongly correlated two-dimensional excitonic insulator ground state in transition metal dichalcogenide semiconductor double layers, providing direct thermodynamic evidence for the state. Capacitance measurements show that the exciton fluid is compressible but charge-incompressible. An exciton phase diagram reveals both the Mott transition and interaction-stabilized quasi-condensation.

NATURE (2021)

Article Physics, Multidisciplinary

Diffusivity Reveals Three Distinct Phases of Interlayer Excitons in MoSe2/WSe2 Heterobilayers

Jue Wang et al.

Summary: In this study, two distinct phase transitions for interlayer excitons in MoSe2/WSe2 heterobilayer were revealed using time and spatially resolved photoluminescence imaging, setting fundamental limits for achieving quantum states of interlayer excitons. The transitions include trapped excitons in moire potential transforming into modestly mobile exciton gas, and then into highly mobile charge separated electron-hole plasma, confirmed as the Mott transition through photoconductivity measurements.

PHYSICAL REVIEW LETTERS (2021)

Article Multidisciplinary Sciences

Dark exciton anti-funneling in atomically thin semiconductors

Roberto Rosati et al.

Summary: Strain engineering is used to manipulate the propagation of excitons in atomically thin transition metal dichalcogenides. The authors observed an anti-funneling behavior, attributed to dark excitons dominating the process. This finding opens up new possibilities for controlling transport in exciton-dominated materials.

NATURE COMMUNICATIONS (2021)

Article Nanoscience & Nanotechnology

Electrical tuning of optically active interlayer excitons in bilayer MoS2

Namphung Peimyoo et al.

Summary: Interlayer excitons in bilayer MoS2 can be electrically controlled at room temperature, offering new opportunities for excitonic devices. The large oscillator strength of the IL excitonic states is preserved as their energies are manipulated by the electric field, indicating potential for practical applications.

NATURE NANOTECHNOLOGY (2021)

Article Physics, Multidisciplinary

Exciton landscape in van der Waals heterostructures

Joakim Hagel et al.

Summary: This study sheds light on the exciton landscape in TMD homo- and heterobilayers at different stackings using exciton density-matrix formalism and density-functional theory, identifying the energetically lowest-lying exciton state for each material and stacking. The research also disentangles the contribution of hybridization and layer polarization-induced alignment shifts of dark and bright excitons in photoluminescence spectra, providing a basis for further studies of the optical, dynamical, and transport properties of van der Waals heterostructures.

PHYSICAL REVIEW RESEARCH (2021)

Article Materials Science, Multidisciplinary

Key role of the moire potential for the quasicondensation of interlayer excitons in van der Waals heterostructures

Camille Lagoin et al.

Summary: Research shows that interlayer excitons in TMD bilayer structures can exhibit superfluidity with the help of moire potential. To achieve exciton superfluidity at higher temperatures, it is necessary to insert a dielectric with high dielectric constant between the monolayers.

PHYSICAL REVIEW B (2021)

Article Materials Science, Multidisciplinary

Exciton-exciton interaction in transition metal dichalcogenide monolayers and van der Waals heterostructures

Daniel Erkensten et al.

Summary: This study examines the microscopic basis of exciton-exciton interactions in two-dimensional materials, identifying a large electron/hole mass asymmetry as a crucial criterion for effective scattering. It highlights the internal charge inhomogeneities of excitons and their cobosonic substructure. Additionally, both exchange and direct exciton-exciton interactions are enhanced by increased exciton Bohr radii, with an unexpected temperature dependence predicted.

PHYSICAL REVIEW B (2021)

Article Multidisciplinary Sciences

U1 snRNP regulates cancer cell migration and invasion in vitro

Jung-Min Oh et al.

NATURE COMMUNICATIONS (2020)

Article Materials Science, Multidisciplinary

Theory of coherent pump-probe spectroscopy in monolayer transition metal dichalcogenides

Florian Katsch et al.

2D MATERIALS (2020)

Article Multidisciplinary Sciences

Twist-tailoring Coulomb correlations in van der Waals homobilayers

Philipp Merkl et al.

NATURE COMMUNICATIONS (2020)

Article Chemistry, Physical

Twist-angle-dependent interlayer exciton diffusion in WS2-WSe2 heterobilayers

Long Yuan et al.

NATURE MATERIALS (2020)

Article Nanoscience & Nanotechnology

Giant Stark splitting of an exciton in bilayer MoS2

Nadine Leisgang et al.

NATURE NANOTECHNOLOGY (2020)

Article Multidisciplinary Sciences

Exciton g-factors in monolayer and bilayer WSe2 from experiment and theory

Jonathan Foerste et al.

NATURE COMMUNICATIONS (2020)

Article Multidisciplinary Sciences

Moire potential impedes interlayer exciton diffusion in van der Waals heterostructures

Junho Choi et al.

SCIENCE ADVANCES (2020)

Article Chemistry, Multidisciplinary

Negative effective excitonic diffusion in monolayer transition metal dichalcogenides

Roberto Rosati et al.

NANOSCALE (2020)

Article Chemistry, Multidisciplinary

Hybridized intervalley moire excitons and flat bands in twisted WSe2bilayers

Samuel Brem et al.

NANOSCALE (2020)

Article Multidisciplinary Sciences

Resonantly hybridized excitons in moire superlattices in van der Waals heterostructures

Evgeny M. Alexeev et al.

NATURE (2019)

Article Materials Science, Multidisciplinary

Finite-momentum exciton landscape in mono- and bilayer transition metal dichalcogenides

Thorsten Deilmann et al.

2D MATERIALS (2019)

Article Chemistry, Physical

Ultrafast transition between exciton phases in van der Waals heterostructures

P. Merkl et al.

NATURE MATERIALS (2019)

Article Nanoscience & Nanotechnology

Valley-polarized exciton currents in a van der Waals heterostructure

Dmitrii Unuchek et al.

NATURE NANOTECHNOLOGY (2019)

Article Multidisciplinary Sciences

Electrical control of interlayer exciton dynamics in atomically thin heterostructures

Luis A. Jauregui et al.

SCIENCE (2019)

Article Materials Science, Multidisciplinary

Spatiotemporal dynamics of Coulomb-correlated carriers in semiconductors

F. Lengers et al.

PHYSICAL REVIEW B (2019)

Article Chemistry, Multidisciplinary

Electrical Tuning of Interlayer Exciton Gases in WSe2 Bilayers

Zefang Wang et al.

NANO LETTERS (2018)

Article Physics, Applied

Exciton diffusion in WSe2 monolayers embedded in a van der Waals heterostructure

F. Cadiz et al.

APPLIED PHYSICS LETTERS (2018)

Article Chemistry, Multidisciplinary

Interlayer Excitons with Large Optical Amplitudes in Layered van der Waals Materials

Thorsten Deilmann et al.

NANO LETTERS (2018)

Article Physics, Multidisciplinary

Exciton Diffusion and Halo Effects in Monolayer Semiconductors

Marvin Kulig et al.

PHYSICAL REVIEW LETTERS (2018)

Article Multidisciplinary Sciences

The role of momentum-dark excitons in the elementary optical response of bilayer WSe2

Jessica Lindlau et al.

NATURE COMMUNICATIONS (2018)

Article Multidisciplinary Sciences

Room-temperature electrical control of exciton flux in a van der Waals heterostructure

Dmitrii Unuchek et al.

NATURE (2018)

Article Physics, Condensed Matter

Theory of Exciton-Exciton Interactions in Monolayer Transition Metal Dichalcogenides

Florian Katsch et al.

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS (2018)

Article Materials Science, Multidisciplinary

Interlayer excitons in MoSe2/WSe2 heterostructures from first principles

Roland Gillen et al.

PHYSICAL REVIEW B (2018)

Review Nanoscience & Nanotechnology

Exciton physics and device application of two-dimensional transition metal dichalcogenide semiconductors

Thomas Mueller et al.

NPJ 2D MATERIALS AND APPLICATIONS (2018)

Article Chemistry, Multidisciplinary

Interlayer Excitons and Band Alignment in MoS2/hBN/WSe2 van der Waals Heterostructures

Simone Latini et al.

NANO LETTERS (2017)

Article Chemistry, Multidisciplinary

Long-Lived Direct and Indirect Interlayer Excitons in van der Waals Heterostructures

Bastian Miller et al.

NANO LETTERS (2017)

Article Materials Science, Multidisciplinary

Exciton-exciton interaction in transition-metal dichalcogenide monolayers

V. Shahnazaryan et al.

PHYSICAL REVIEW B (2017)

Article Materials Science, Multidisciplinary

Interlayer exciton dynamics in a dichalcogenide monolayer heterostructure

Philipp Nagler et al.

2D MATERIALS (2017)

Article Materials Science, Multidisciplinary

Theory of two-dimensional spatially indirect equilibrium exciton condensates

Feng-Cheng Wu et al.

PHYSICAL REVIEW B (2015)

Article Multidisciplinary Sciences

High-temperature superfluidity with indirect excitons in van der Waals heterostructures

M. M. Fogler et al.

NATURE COMMUNICATIONS (2014)

Article Multidisciplinary Sciences

Van der Waals heterostructures

A. K. Geim et al.

NATURE (2013)

Article Materials Science, Multidisciplinary

Analysis of the exciton-exciton interaction in semiconductor quantum wells

Christoph Schindler et al.

PHYSICAL REVIEW B (2008)

Article Physics, Multidisciplinary

Quantum diffusion of dipole-oriented indirect excitons in coupled quantum wells

AL Ivanov

EUROPHYSICS LETTERS (2002)

Article Materials Science, Multidisciplinary

Exciton-exciton interactions in quantum wells: Optical properties and energy and spin relaxation

SB de-Leon et al.

PHYSICAL REVIEW B (2001)