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The conformal invariance of the low energy limit theory governing the electronic properties of graphene is explored. In particular, it is noted that the massless Dirac theory in point enjoys local Weyl symmetry, a very large symmetry.…

高能物理 - 理论 · 物理学 2011-04-20 Alfredo Iorio

Graphene is a two-dimensional (2D) material with over 100-fold anisotropy of heat flow between the in-plane and out-of-plane directions. High in-plane thermal conductivity is due to covalent sp2 bonding between carbon atoms, whereas…

材料科学 · 物理学 2013-01-29 Eric Pop , Vikas Varshney , Ajit K. Roy

Geometrical objects describing the material geometry of continuously defective graphene sheets are introduced and their compatibility conditions are formulated. Effective edge dislocations embedded in the Riemann-Cartan material space and…

数学物理 · 物理学 2015-07-31 Andrzej Trzesowski

Thermal properties of graphene display peculiar characteristics associated to the two-dimensional nature of this crystalline membrane. These properties can be changed and tuned in the presence of applied stresses, both tensile and…

材料科学 · 物理学 2018-06-07 Carlos P. Herrero , Rafael Ramirez

In addition to its exotic electronic properties graphene exhibits unusually high intrinsic thermal conductivity. The physics of phonons - the main heat carriers in graphene - was shown to be substantially different in two-dimensional (2D)…

In this paper, we present the solutions of the Dirac-Weyl equation for graphene under a constant magnetic field. The resulting spectrum is used to determine the partition function, a key quantity in the study of thermodynamic properties.…

We seek a rational route to large-deformation, thermo-mechanical modeling of solids with metrical defects. It assumes the reference and deformed geometries to be of the Weyl type and introduces the Weyl one-form -- an additional set of…

其他凝聚态物理 · 物理学 2019-04-16 Bensingh Dhas , Arun R Srinivasa , Debasish Roy

Defects play a key role in the electronic structure of graphene layers flat or curved. Topological defects in which an hexagon is replaced by an n-sided polygon generate long range interactions that make them different from vacancies or…

强关联电子 · 物理学 2008-11-26 Alberto Cortijo , María A. H. Vozmediano

We investigated the thermodynamic properties of graphene in a noncommutative phase-space in the presence of a constant magnetic field. In particular, we determined the behaviour of the main thermodynamical functions: the Helmholtz free…

高能物理 - 理论 · 物理学 2014-07-29 Victor Santos , R. V. Maluf , C. A. S. Almeida

Thermal properties of graphene monolayers are studied by path-integral molecular dynamics (PIMD) simulations, which take into account the quantization of vibrational modes in the crystalline membrane, and allow one to consider anharmonic…

材料科学 · 物理学 2017-09-18 Carlos P. Herrero , Rafael Ramirez

The understanding of the structural and thermal properties of membranes, low-dimensional flexible systems in a space of higher dimension, is pursued in many fields from string theory to chemistry and biology. The case of a two-dimensional…

介观与纳米尺度物理 · 物理学 2013-02-08 Mikhail I. Katsnelson , Annalisa Fasolino

The subject of thermal transport at the mesoscopic scale and in low-dimensional systems is interesting for both fundamental research and practical applications. As the first example of truly two-dimensional materials, graphene has…

材料科学 · 物理学 2014-06-10 Yong Xu , Zuanyi Li , Wenhui Duan

Graphene as a two-dimensional (2D) topological Dirac semimetal has attracted much attention for its outstanding properties and potential applications. However, three-dimensional (3D) topological semimetals for carbon materials are still…

Mapping the thermal transport properties of materials at the nanoscale is of critical importance for optimizing heat conduction in nanoscale devices. Several methods to determine the thermal conductivity of materials have been developed,…

介观与纳米尺度物理 · 物理学 2021-03-17 Oliver Braun , Roman Furrer , Pascal Butti , Kishan R. Thodkar , Ivan Shorubalko , Ilaria Zardo , Michel Calame , Mickael L. Perrin

A discovery of the unusual thermal properties of graphene stimulated experimental, theoretical and computational research directed at understanding phonon transport and thermal conduction in two-dimensional material systems. We provide a…

材料科学 · 物理学 2017-02-16 Denis L. Nika , Alexander A. Balandin

We generalize the concept of three-dimensional topological Weyl semimetal to a class of five dimensional (5D) gapless solids, where Weyl points are generalized to Weyl surfaces which are two-dimensional closed manifolds in the momentum…

介观与纳米尺度物理 · 物理学 2016-07-06 Biao Lian , Shou-Cheng Zhang

I present a concise account concerning the emergence of a research field, which deals with the thermal properties of graphene, covering the refinement of understanding of phonon transport in two-dimensional material systems. The practical…

介观与纳米尺度物理 · 物理学 2022-03-01 Alexander A. Balandin

A generalized Dirac equation is derived in order to describe charge carriers moving in corrugated graphene, which is the case for temperatures above 10{\deg}K due to the presence of flexural phonons. Such interaction is taken into account…

材料科学 · 物理学 2015-10-12 Richard Kerner , Gerardo Naumis

We review thermal properties of graphene and few-layer graphene, and discuss applications of these materials in thermal management of advanced electronics. The intrinsic thermal conductivity of graphene - among the highest of known…

介观与纳米尺度物理 · 物理学 2015-08-11 Zhong Yan , Denis L. Nika , Alexander A. Balandin

All-carbon heterostructures have been produced recently via focused ion beam patterning of single layer graphene. Amorphized graphene is similar to a graphene sheet in which some hexagons are replaced by a combination of pentagonal,…

材料科学 · 物理学 2017-04-07 B Mortazavi , Z Fan , LFC Pereira , A Harju , T Rabczuk
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