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First-principles density-functional calculations are performed to investigate the thermal transport properties in graphene nanoribbons (GNRs). The dimensional crossover of thermal conductance from one to two dimensions (2D) is clearly…

介观与纳米尺度物理 · 物理学 2015-06-04 Jian Wang , Xiao-Ming Wang , Yun-Fei Chen , Jian-Sheng Wang

We have studied electronic conductivity and shot noise of bilayer graphene (BLG) sheets at high bias voltages and low bath temperature $T_0=4.2$ K. As a function of bias, we find initially an increase of the differential conductivity, which…

介观与纳米尺度物理 · 物理学 2011-09-07 A. Fay , R. Danneau , J. K. Viljas , F. Wu , M. Y. Tomi , J. Wengler , M. Wiesner , P. J. Hakonen

We investigate the phonon thermal conductance of graphene regarding the graphene sheet as the large-width limit of graphene strips in the ballistic limit. We find that the thermal conductance depends weakly on the direction angle $\theta$…

材料科学 · 物理学 2009-05-22 Jin-Wu Jiang , Jian-Sheng Wang , Baowen Li

Two-dimensional (2D) materials are a new class of materials with interesting physical properties and applications ranging from nanoelectronics to sensing and photonics. In addition to graphene, the most studied 2D material, monolayers of…

材料科学 · 物理学 2022-04-12 Lianhua Zhang , Jian Chen , Fei Liu , Zhengyang Du , Yilun Jiang , Min Han

We measure the temperature distribution in a biased single-layer graphene transistor using Raman scattering microscopy of the 2D-phonon band. Peak operating temperatures of 1050 K are reached in the middle of the graphene sheet at 210 KW…

We develop a theory for density, disorder, and temperature dependent electrical conductivity of bilayer graphene in the presence of long-range charged impurity scattering as well as an additional short-range disorder of independent origin,…

介观与纳米尺度物理 · 物理学 2010-04-21 S. Das Sarma , E. H. Hwang , E. Rossi

The fast electron transport and superior multidirectional flexibility of three-dimensional graphene-based foams (GFs) are pivotal in the realm of stretchable electronics. We observed pre-stretching induced modulation of the…

材料科学 · 物理学 2024-11-27 Shu-Ting Guo , Fangxin Zou

The ability to transport energy is a fundamental property of the two-dimensional Dirac fermions in graphene. Electronic thermal transport in this system is relatively unexplored and is expected to show unique fundamental properties and to…

介观与纳米尺度物理 · 物理学 2013-08-13 K. C. Fong , Emma Wollman , Harish Ravi , Wei Chen , Aash Clerk , M. D. Shaw , H. G. LeDuc , K. C. Schwab

We review experimental and theoretical results on thermal transport in semiconductor nanostructures (multilayer thin films, core/shell and segmented nanowires), single- and few-layer graphene, hexagonal boron nitride, molybdenum disulfide…

介观与纳米尺度物理 · 物理学 2018-06-13 Alexandr I. Cocemasov , Calina I. Isacova , Denis L. Nika

We review the fabrication and key transport properties of graphene double layers, consisting of two graphene monolayers placed in close proximity, independently contacted, and separated by an ultra-thin dielectric. We outline a simple band…

介观与纳米尺度物理 · 物理学 2012-06-14 Seyoung Kim , Emanuel Tutuc

Recently, the twist-angle effect on 2D van der Walls (vdW) materials, such as bilayer graphene, has attracted great attention. Many novel electronic, magnetic and even optical properties induced by such effect have been discovered. However,…

介观与纳米尺度物理 · 物理学 2023-12-20 H. F. Feng , B. Liu , Zhi-Xin Guo

We report our theoretical calculations on the temperature and energy dependent electrical conductivity of gapped graphene within the framework of Boltzmann transport formalism. Since screening effects have known to be of vital importance in…

介观与纳米尺度物理 · 物理学 2015-04-07 Digish K Patel , A C Sharma , S S Z Ashraf

Using the linearized Boltzmann transport equation and perturbation theory, we analyze the reduction in the intrinsic thermal conductivity of few-layer graphene sheets accounting for all possible three-phonon scattering events. Even with…

介观与纳米尺度物理 · 物理学 2015-05-28 Dhruv Singh , Jayathi Y. Murthy , Timothy S. Fisher

Using first-principles modeling, we investigate how phonon transport evolves in layered/van der Waals materials when going from 3D to 2D, or vice versa, by gradually pulling apart the atomic layers in graphite to form graphene. Focus is…

介观与纳米尺度物理 · 物理学 2021-08-04 Patrick Strongman , Jesse Maassen

Nano-graphene /polymer composites can functionas pressure induced electro-switches, at concentrations around their conductivity percolation threshold. Close to the critical point, the pressure dependence of the electron tunneling through…

We study the effect of electron-acoustic phonon interactions in twisted bilayer graphene on resistivity in the high-temperature transport and superconductivity in the low-temperature phase diagram. We theoretically show that twisted bilayer…

介观与纳米尺度物理 · 物理学 2019-04-10 Fengcheng Wu , Euyheon Hwang , Sankar Das Sarma

We discuss the effect of the dielectric environment (insulators and metal gates) on electronic transport in two-dimensional (2D) transition metal dichalcogenides (TMD) monolayers. We employ well-known ab initio methods to calculate the…

介观与纳米尺度物理 · 物理学 2022-08-24 Sanjay Gopalan , Maarten L. Van de Put , Gautam Gaddemane , Massimo V. Fischetti

We present transport measurements of electrons on the surface of liquid helium in a microchannel device in which a constriction may be formed by a split-gate electrode. The surface electron current passing through the microchannel first…

介观与纳米尺度物理 · 物理学 2015-05-28 David Rees , Isao Kuroda , Claire Marrache-Kikuchi , Moritz Hofer , Paul Leiderer , Kimitoshi Kono

Self-heating is a severe problem for high-power microelectronic devices. Graphene and few-layer graphene have attracted tremendous attention for heat removal thanks to their extraordinarily high in-plane thermal conductivity. However, this…

We investigate transport in graphene supported on various dielectrics (SiO2, BN, Al2O3, HfO2) through a hydrodynamic model which includes self-heating and thermal coupling to the substrate, scattering with ionized impurities, graphene…

介观与纳米尺度物理 · 物理学 2014-07-21 Andrey Y. Serov , Zhun-Yong Ong , Massimo V. Fischetti , Eric Pop