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Recent Graphene Papers from APS

All-optical band engineering of gapped Dirac materials

Physical Review: Graphene - Wed, 01/03/2017 - 11:00pm

Author(s): O. V. Kibis, K. Dini, I. V. Iorsh, and I. A. Shelykh

We demonstrate theoretically that the interaction of electrons in gapped Dirac materials (gapped graphene and transition-metal dichalchogenide monolayers) with a strong off-resonant electromagnetic field (dressing field) substantially renormalizes the band gaps and the spin-orbit splitting. Moreover…

[Phys. Rev. B 95, 125401] Published Wed Mar 01, 2017

Robust Two-Dimensional Electronic Properties in Three-Dimensional Microstructures of Rotationally Stacked Turbostratic Graphene

Physical Review: Graphene - Thu, 23/02/2017 - 11:00pm

Author(s): Nils Richter, Yenny R. Hernandez, Sebastian Schweitzer, June-Seo Kim, Ajit Kumar Patra, Jan Englert, Ingo Lieberwirth, Andrea Liscio, Vincenzo Palermo, Xinliang Feng, Andreas Hirsch, Klaus Müllen, and Mathias Kläui

Turbostratic graphene disks feature multiple layers with rotational stacking order, which ensures electronic decoupling of adjacent layers. Despite there being up to 100 graphene sheets per disk, the authors find the signature of two−dimensional charge transport. With its central region well protected from environmental influence, this system combines the merits of single-layer graphene with a remarkable, consistent robustness, making it eminently suitable for device integration.

[Phys. Rev. Applied 7, 024022] Published Thu Feb 23, 2017

General Green's function formalism for layered systems: Wave function approach

Physical Review: Graphene - Fri, 17/02/2017 - 11:00pm

Author(s): Shu-Hui Zhang, Wen Yang, and Kai Chang

The single-particle Green's function (GF) of mesoscopic structures plays a central role in mesoscopic quantum transport. The recursive GF technique is a standard tool to compute this quantity numerically, but it lacks physical transparency and is limited to relatively small systems. Here we present …

[Phys. Rev. B 95, 075421] Published Fri Feb 17, 2017

Interaction effects in a chaotic graphene quantum billiard

Physical Review: Graphene - Mon, 13/02/2017 - 11:00pm

Author(s): Imre Hagymási, Péter Vancsó, András Pálinkás, and Zoltán Osváth

We investigate the local electronic structure of a Sinai-like, quadrilateral graphene quantum billiard with zigzag and armchair edges using scanning tunneling microscopy (STM) at room temperature. It is revealed that besides the (3×3)R30∘ superstructure, which is caused by the intervalley scattering…

[Phys. Rev. B 95, 075123] Published Mon Feb 13, 2017

Ultrafast Multiphoton Thermionic Photoemission from Graphite

Physical Review: Graphene - Tue, 17/01/2017 - 11:00pm

Author(s): Shijing Tan, Adam Argondizzo, Cong Wang, Xuefeng Cui, and Hrvoje Petek

When exposed to an ultrafast laser pulse, electrons within graphite are warmed to the same temperature as the surface of the Sun. This behavior could explain how laser light can turn graphite into diamond and allow for efficient chemistry on the surface of graphitic materials.

[Phys. Rev. X 7, 011004] Published Tue Jan 17, 2017

Publisher's Note: Interpenetrating graphene networks: Three-dimensional node-line semimetals with massive negative linear compressibilities [Phys. Rev. B 94, 245422 (2016)]

Physical Review: Graphene - Tue, 17/01/2017 - 11:00pm

Author(s): Yangzheng Lin, Zhisheng Zhao, Timothy A. Strobel, and R. E. Cohen

[Phys. Rev. B 95, 039903] Published Tue Jan 17, 2017

Erratum: Analytic model of the energy spectrum of a graphene quantum dot in a perpendicular magnetic field [Phys. Rev. B 78, 195427 (2008)]

Physical Review: Graphene - Tue, 10/01/2017 - 11:00pm

Author(s): S. Schnez, Klaus Ensslin, M. Sigrist, and T. Ihn

[Phys. Rev. B 95, 039901] Published Tue Jan 10, 2017

Deviation from the Normal Mode Expansion in a Coupled Graphene-Nanomechanical System

Physical Review: Graphene - Thu, 29/12/2016 - 11:00pm

Author(s): Cornelia Schwarz, Benjamin Pigeau, Laure Mercier de Lépinay, Aurélien G. Kuhn, Dipankar Kalita, Nedjma Bendiab, Laëtitia Marty, Vincent Bouchiat, and Olivier Arcizet

Normal-mode expansion is routinely used to model multimodal mechanical systems, but at the nanoscale its assumptions are not always valid. The authors find that in the presence of spatiallyheterogeneous dissipation, the thermal noise spectrum of a hybrid nanomechanical system includes anomalous lineshapes quite different from model predictions. To address this, they measure the local mechanical susceptibility, and verify the validity of the Fluctuation-Dissipation Theorem in the coupled device.

[Phys. Rev. Applied 6, 064021] Published Thu Dec 29, 2016

Interpenetrating graphene networks: Three-dimensional node-line semimetals with massive negative linear compressibilities

Physical Review: Graphene - Mon, 19/12/2016 - 11:00pm

Author(s): Yangzheng Lin, Zhisheng Zhao, Timothy A. Strobel, and R. E. Cohen

We investigated the stability and mechanical and electronic properties of 15 metastable mixed sp2−sp3 carbon allotropes in the family of interpenetrating graphene networks (IGNs) using density functional theory (DFT). IGN allotropes exhibit nonmonotonic bulk and linear compressibilities before their…

[Phys. Rev. B 94, 245422] Published Mon Dec 19, 2016

Role of direct exchange and Dzyaloshinskii-Moriya interactions in magnetic properties of graphene derivatives: C_{2} F and C_{2} H

Physical Review: Graphene - Mon, 12/12/2016 - 11:00pm

Author(s): V. V. Mazurenko, A. N. Rudenko, S. A. Nikolaev, D. S. Medvedeva, A. I. Lichtenstein, and M. I. Katsnelson

According to Lieb's theorem the ferromagnetic interaction in graphene-based materials with bipartite lattice is a result of disbalance between the number of sites available for pz electrons in different sublattices. Here we report on another mechanism of the ferromagnetism in functionalized graphene…

[Phys. Rev. B 94, 214411] Published Mon Dec 12, 2016

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