Journal ArticleDOI
One-dimensional electrical contact to a two-dimensional material.
Lei Wang,Inanc Meric,Pinshane Y. Huang,Qun Gao,Yuanda Gao,Helen Tran,Takashi Taniguchi,Kenji Watanabe,Luis M. Campos,David A. Muller,Jing Guo,Philip Kim,James Hone,Kenneth L. Shepard,Cory Dean,Cory Dean +15 more
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TLDR
In graphene heterostructures, the edge-contact geometry provides new design possibilities for multilayered structures of complimentary 2D materials, and enables high electronic performance, including low-temperature ballistic transport over distances longer than 15 micrometers, and room-tem temperature mobility comparable to the theoretical phonon-scattering limit.Abstract:
Heterostructures based on layering of two-dimensional (2D) materials such as graphene and hexagonal boron nitride represent a new class of electronic devices. Realizing this potential, however, depends critically on the ability to make high-quality electrical contact. Here, we report a contact geometry in which we metalize only the 1D edge of a 2D graphene layer. In addition to outperforming conventional surface contacts, the edge-contact geometry allows a complete separation of the layer assembly and contact metallization processes. In graphene heterostructures, this enables high electronic performance, including low-temperature ballistic transport over distances longer than 15 micrometers, and room-temperature mobility comparable to the theoretical phonon-scattering limit. The edge-contact geometry provides new design possibilities for multilayered structures of complimentary 2D materials.read more
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Black Phosphorus: Narrow Gap, Wide Applications
TL;DR: The recent isolation of atomically thin black phosphorus by mechanical exfoliation of bulk layered crystals has triggered an unprecedented interest, even higher than that raised by the first works on graphene and other two-dimensionals, in the nanoscience and nanotechnology community.
Journal ArticleDOI
Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
Jesse Crossno,Jing K. Shi,Ke Wang,Xiaomeng Liu,Achim Harzheim,Andrew Lucas,Subir Sachdev,Subir Sachdev,Philip Kim,Takashi Taniguchi,Kenji Watanabe,Thomas A. Ohki,Kin Chung Fong +12 more
TL;DR: Employing high-sensitivity Johnson noise thermometry, an order of magnitude increase in the thermal conductivity and the breakdown of the Wiedemann-Franz law is reported in the thermally populated charge-neutral plasma in graphene, a signature of the Dirac fluid and constitutes direct evidence of collective motion in a quantum electronic fluid.
Journal ArticleDOI
Negative local resistance caused by viscous electron backflow in graphene
Denis A. Bandurin,Iacopo Torre,R. Krishna Kumar,R. Krishna Kumar,M. Ben Shalom,Andrea Tomadin,Alessandro Principi,Gregory Auton,Ekaterina Khestanova,Kostya S. Novoselov,Irina V. Grigorieva,Leonid Ponomarenko,Leonid Ponomarenko,Andre K. Geim,Marco Polini +14 more
TL;DR: Graphene hosts a unique electron system in which electron-phonon scattering is extremely weak but electron-electron collisions are sufficiently frequent to provide local equilibrium above the temperature of liquid nitrogen, under which electrons can behave as a viscous liquid and exhibit hydrodynamic phenomena similar to classical liquids.
Journal ArticleDOI
Electrical Control of 2D Magnetism in Bilayer CrI3
Bevin Huang,Genevieve Clark,Dahlia R. Klein,David MacNeill,Efrén Navarro-Moratalla,Kyle L. Seyler,Nathan P. Wilson,Michael A. McGuire,David Cobden,Di Xiao,Wang Yao,Pablo Jarillo-Herrero,Xiaodong Xu +12 more
TL;DR: In this article, the authors demonstrate voltage-controlled switching between antiferromagnetic and ferromagnetic states in bilayer chromium triiodide (CrI3) bilayers.
Journal ArticleDOI
Detecting topological currents in graphene superlattices
Roman V. Gorbachev,Justin C. W. Song,Justin C. W. Song,Geliang Yu,Andrey V. Kretinin,Freddie Withers,Yang Cao,Artem Mishchenko,Irina V. Grigorieva,Konstantin S. Novoselov,Leonid Levitov,Andre K. Geim +11 more
TL;DR: In this article, a nonlocal voltage at zero magnetic field in a narrow energy range near Dirac points at distances as large as several micrometers away from the nominal current path was observed, indicating large valley-Hall angles.
References
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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
Boron nitride substrates for high-quality graphene electronics
Cory Dean,Andrea Young,Inanc Meric,Changgu Lee,Lei Wang,Sebastian Sorgenfrei,Kenji Watanabe,Takashi Taniguchi,Philip Kim,Kenneth L. Shepard,James Hone +10 more
TL;DR: Graphene devices on h-BN substrates have mobilities and carrier inhomogeneities that are almost an order of magnitude better than devices on SiO(2).
Book
Electronic transport in mesoscopic systems
TL;DR: In this article, preliminary concepts of conductance from transmission, S-matrix and Green's function formalism are discussed. And double-barrier tunnelling is considered.
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