Results 31 to 40 of about 2,902 (157)

Signatures of moir\'e-trapped valley excitons in MoSe$_2$/WSe$_2$ heterobilayers [PDF]

open access: yes, 2018
The creation of moir\'e patterns in crystalline solids is a powerful approach to manipulate their electronic properties, which are fundamentally influenced by periodic potential landscapes. In 2D materials, a moir\'e pattern with a superlattice potential
Mandrus, David   +8 more
core   +2 more sources

Intralayer Phonons in Multilayer Graphene Moiré Superlattices

open access: yesResearch, 2022
Moiré pattern in twisted multilayers (tMLs) induces many emergent phenomena by subtle variation of atomic registry to modulate quasiparticles and their interactions, such as superconductivity, moiré excitons, and moiré phonons.
Miao-Ling Lin   +13 more
doaj   +1 more source

Bismuth incorporation and the role of ordering in GaAsBi/GaAs structures [PDF]

open access: yes, 2014
The structure and composition of single GaAsBi/GaAs epilayers grown by molecular beam epitaxy were investigated by optical and transmission electron microscopy techniques.
Bastiman, Faebian   +6 more
core   +2 more sources

Electrically tunable topological transport of moir\'e polaritons

open access: yes, 2020
Moir\'e interlayer exciton in transition metal dichalcogenide heterobilayer features a permanent electric dipole that enables the electrostatic control of its flow, and optical dipole that is spatially varying in the moir\'e landscape.
Yao, Wang, Yu, Hongyi
core   +1 more source

The Coexistence of van Hove Singularities and Superlattice Dirac Points in a Slightly Twisted Graphene Bilayer

open access: yes, 2013
We consider the electronic structure of a slightly twisted graphene bilayer and show the coexistence of van Hove singularities (VHSs) and superlattice Dirac points in a continuum approximation.
Chu, Zhao-Dong, He, Lin, He, Wen-Yu
core   +1 more source

Resolving spin, valley, and moir\'e quasi-angular momentum of interlayer excitons in WSe2/WS2 heterostructures

open access: yes, 2019
Moir\'e superlattices provide a powerful way to engineer properties of electrons and excitons in two-dimensional van der Waals heterostructures. The moir\'e effect can be especially strong for interlayer excitons, where electrons and holes reside in ...
Cain, Jeffrey   +13 more
core   +2 more sources

Moiré‐Assisted Realization of Octahedral MoTe2 Monolayer

open access: yesAdvanced Science, 2023
A current key challenge in 2D materials is the realization of emergent quantum phenomena in hetero structures via controlling the moiré potential created by the periodicity mismatch between adjacent layers, as highlighted by the discovery of ...
Yasuaki Saruta   +9 more
doaj   +1 more source

Strain-induced Evolution of Electronic Band Structures in a Twisted Graphene Bilayer

open access: yes, 2013
Here we study the evolution of local electronic properties of a twisted graphene bilayer induced by a strain and a high curvature. The strain and curvature strongly affect the local band structures of the twisted graphene bilayer; the energy difference ...
A Altland   +57 more
core   +1 more source

Tailoring excitonic states of van der Waals bilayers through stacking configuration, band alignment and valley-spin [PDF]

open access: yes, 2019
Excitons in monolayer semiconductors have large optical transition dipole for strong coupling with light field. Interlayer excitons in heterobilayers, with layer separation of electron and hole components, feature large electric dipole that enables ...
Chang, Wen-Hao   +8 more
core   +2 more sources

Magic configurations in moiré superlattice of bilayer photonic crystals: Almost-perfect flatbands and unconventional localization

open access: yesPhysical Review Research, 2022
We investigate the physics of photonic band structures of the moiré patterns that emerged when overlapping two unidimensional photonic crystal slabs with mismatched periods. The band structure of our system is a result of the interplay between intralayer
Dung Xuan Nguyen   +5 more
doaj   +1 more source

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