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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Josephson junction infrared single-photon detector
Evan D. Walsh,Evan D. Walsh,Woochan Jung,Gil-Ho Lee,Gil-Ho Lee,Dmitri K. Efetov,Bae-Ian Wu,Katie Huang,Thomas A. Ohki,Takashi Taniguchi,Kenji Watanabe,Philip Kim,Dirk Englund,Kin Chung Fong +13 more
TL;DR: In this paper, a single near-infrared photon detection was demonstrated by coupling photons to the localized surface plasmons of a graphene-based Josephson junction, which revealed the critical role of quasiparticles generated by the absorbed photon in the detection mechanism.
Journal ArticleDOI
Interface engineering of two-dimensional transition metal dichalcogenides towards next-generation electronic devices: recent advances and challenges
TL;DR: This article elucidates multifarious contact engineering approaches such as edge contact, phase engineering and metal transfer to suppress the Fermi level pinning effect at the metal/TMDC interface, various channel treatment avenues such as van der Waals heterostructures, surface charge transfer doping to modulate the device properties, and the novel electronics constructed by interface engineering such as diodes, circuits and memories.
Journal ArticleDOI
Graphene hot-electron light bulb: incandescence from hBN-encapsulated graphene in air
Seok-Kyun Son,Makars Šiškins,Ciaran Mullan,Jun Yin,Vasyl G. Kravets,Aleksey Kozikov,Servet Ozdemir,Manal Alhazmi,Matthew Holwill,Kenji Watanabe,Takashi Taniguchi,Davit Ghazaryan,Kostya S. Novoselov,Vladimir I. Fal'ko,Artem Mishchenko +14 more
TL;DR: In this article, hexagonal boron nitride (hBN) is used to protect hot graphene filaments even at temperatures well above 2000 K. The results demonstrate that hBN/graphene heterostructures can be used to conveniently explore the technologically important high-temperature regime and to pave the way for future optoelectronic applications of graphene-based systems.
Journal Article
Observation of Helical Edge States and Fractional Quantum Hall Effect in a Graphene Electron-hole Bilayer
TL;DR: The graphene electron-hole bilayer can be used to build new 1D systems incorporating fractional edge states and is able to tune the bilayer devices into a regime hosting fractional and integer edge states of opposite chiralities, paving the way towards 1D helical conductors with fractional quantum statistics.
Journal ArticleDOI
Ultrafast photocurrent measurements of a black phosphorus photodetector
Nathan Youngblood,Mo Li +1 more
TL;DR: In this paper, the authors measured the intrinsic speed of a BP photodetector using ultrafast pump-probe measurements and observed how the detection speed depends on both the incident power and applied source-drain bias.
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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