Composite super-moiré lattices in double-aligned graphene heterostructures.
Zihao Wang,Yi Bo Wang,Jun Yin,Jun Yin,Endre Tóvári,Yaping Yang,Li Lin,Matthew Holwill,John Birkbeck,David J. Perello,Shuigang Xu,Johanna Zultak,Roman V. Gorbachev,Roman V. Gorbachev,Andrey V. Kretinin,T. Taniguchi,Kenji Watanabe,Sergey V. Morozov,Miša Anđelković,S. P. Milovanović,Lucian Covaci,François M. Peeters,Artem Mishchenko,Andre K. Geim,K. S. Novoselov,Vladimir I. Fal'ko,Vladimir I. Fal'ko,Angelika Knothe,Colin R. Woods +28 more
TLDR
In this paper, the authors present a route to spectrum reconstruction at all energies by using graphene which is aligned to two hexagonal boron nitride layers, one can make electrons scatter in the differential moire pattern which results in spectral changes at arbitrarily low energies.Abstract:
When two-dimensional (2D) atomic crystals are brought into close proximity to form a van der Waals heterostructure, neighbouring crystals may influence each other's properties. Of particular interest is when the two crystals closely match and a moire pattern forms, resulting in modified electronic and excitonic spectra, crystal reconstruction, and more. Thus, moire patterns are a viable tool for controlling the properties of 2D materials. However, the difference in periodicity of the two crystals limits the reconstruction and, thus, is a barrier to the low-energy regime. Here, we present a route to spectrum reconstruction at all energies. By using graphene which is aligned to two hexagonal boron nitride layers, one can make electrons scatter in the differential moire pattern which results in spectral changes at arbitrarily low energies. Further, we demonstrate that the strength of this potential relies crucially on the atomic reconstruction of graphene within the differential moire super cell.read more
Citations
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Charge-polarized interfacial superlattices in marginally twisted hexagonal boron nitride.
Colin R. Woods,Pablo Ares,H. Nevison-Andrews,Matthew Holwill,Rene Fabregas,Francisco Guinea,Francisco Guinea,Andre K. Geim,Kostya S. Novoselov,Niels R. Walet,Laura Fumagalli +10 more
TL;DR: In this article, two insulating crystals of hexagonal boron nitride stacked at small twist angle were observed to have a bilayer-thick ferroelectric with oppositely polarized dipoles in neighbouring domains.
Journal ArticleDOI
Proximity Spin-Orbit Torque on a Two-Dimensional Magnet within van der Waals Heterostructure: Current-Driven Antiferromagnet-to-Ferromagnet Reversible Nonequilibrium Phase Transition in Bilayer CrI3.
Kapildeb Dolui,Marko D. Petrović,Klaus Zollner,Petr Plecháč,Jaroslav Fabian,Branislav K. Nikolić +5 more
TL;DR: It is demonstrated that current pulses can switch the direction of magnetization on the first monolayer to become parallel to that of the second monolayers, thereby converting CrI3 from antiferromagnet to ferromagnets while not requiring any external magnetic field.
Journal ArticleDOI
2D Heterostructures for Ubiquitous Electronics and Optoelectronics: Principles, Opportunities, and Challenges.
TL;DR: In this article , a comprehensive review of representative 2D materials, general fabrication methods, and characterization techniques and the vital role of the physical parameters affecting the quality of 2D heterostructures are discussed.
Posted Content
Charge-polarized interfacial superlattices in marginally twisted hexagonal boron nitride
Colin R. Woods,Pablo Ares,H. Nevison-Andrews,Matthew Holwill,Rene Fabregas,Francisco Guinea,Francisco Guinea,Andre K. Geim,Kostya S. Novoselov,Niels R. Walet,Laura Fumagalli +10 more
TL;DR: Moiré superlattices generated by twisted insulating crystals of hexagonal boron nitride are shown to have a ferroelectric-like character, attributed to strain-induced polarized dipoles formed by pairs of interfacial bor on and nitrogen atoms that create bilayer-thick ferro electric domains.
Journal ArticleDOI
Moiré Patterns in 2D Materials: A Review.
Feng He,Feng He,Yongjian Zhou,Zefang Ye,Sang-Hyeok Cho,Jihoon Jeong,Xianghai Meng,Yaguo Wang +7 more
TL;DR: In this article, the authors summarize the methods to prepare moire superlattices in van der Waals materials and focus on the current discoveries of moire pattern-modified electrical properties, recent findings of atomic reconstruction, as well as some possible future directions in this field.
References
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Journal ArticleDOI
Electric Field Effect in Atomically Thin Carbon Films
Kostya S. Novoselov,Andre K. Geim,Sergey V. Morozov,Da Jiang,Y. Zhang,S. V. Dubonos,Irina V. Grigorieva,A. A. Firsov +7 more
TL;DR: Monocrystalline graphitic films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands and they exhibit a strong ambipolar electric field effect.
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Fast parallel algorithms for short-range molecular dynamics
TL;DR: In this article, three parallel algorithms for classical molecular dynamics are presented, which can be implemented on any distributed-memory parallel machine which allows for message-passing of data between independently executing processors.
Fast parallel algorithms for short-range molecular dynamics
TL;DR: Comparing the results to the fastest reported vectorized Cray Y-MP and C90 algorithm shows that the current generation of parallel machines is competitive with conventional vector supercomputers even for small problems.
Journal ArticleDOI
Van der Waals heterostructures
TL;DR: With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own.
Journal ArticleDOI
Unconventional superconductivity in magic-angle graphene superlattices
Yuan Cao,Valla Fatemi,Shiang Fang,Kenji Watanabe,Takashi Taniguchi,Efthimios Kaxiras,Pablo Jarillo-Herrero +6 more
TL;DR: The realization of intrinsic unconventional superconductivity is reported—which cannot be explained by weak electron–phonon interactions—in a two-dimensional superlattice created by stacking two sheets of graphene that are twisted relative to each other by a small angle.
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