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Trilayer graphene exhibits valley-protected gapless states when the stacking order changes from ABC to CBA and a gate voltage is applied to outer layers. Some of these states survive strong distortions of the trilayer. For example, they…

Mesoscale and Nanoscale Physics · Physics 2023-09-29 Wlodzimierz Jaskolski

One of the greatest issues of nanoelectronics today is how to control the heating of the components. Graphene is a promising material in this area and it is essential to study its thermal properties. Here, the effect of heating a bilayer…

Materials Science · Physics 2014-02-13 Johan Ek Weis , Sara Costa , Otakar Frank , Martin Kalbac

We numerically study the thermoelectric and thermal transport in trilayer graphene with different stacking orders in the presence of interlayer bias under a strong perpendicular magnetic field. In biased ABA-stacked case, we find that the…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 R. Ma , L. Sheng , M. Liu , D. N. Sheng

The line shape of the double-resonant $2D$ Raman mode in bilayer graphene is often considered to be characteristic for a certain laser excitation energy. Here, in a joint experimental and theoretical study, we analyze the dependence of the…

Mesoscale and Nanoscale Physics · Physics 2018-12-19 Felix Herziger , Christoph Tyborski , Oliver Ochedowski , Marika Schleberger , Janina Maultzsch

We study the electronic properties of h-BN/graphene/h-BN ABC-stacked trilayer systems using tight binding and DFT methods. We comment on the recent work of Ramasubramaniam et al. (arxiv:1011.2489) whose results seem to be in disagreement…

Materials Science · Physics 2010-12-13 J. Slawinska , I. Zasada , P. Kosinski , Z. Klusek

Graphite occurs in a range of metastable stacking orders characterized by both the number and direction of shifts between adjacent layers by the length of a single carbon-carbon bond. At the extremes are Bernal (or ``ABAB...'') stacking,…

We present a first-principles study of the electron-phonon (e-ph) interactions and their contributions to the linewidths for the optical phonon modes at $\Gamma$ and K in one to three-layer graphene. It is found that due to the interlayer…

Materials Science · Physics 2009-03-31 Jia-An Yan , W. Y. Ruan , M. Y. Chou

The electronic structure of few-layer graphene (FLG) samples with crystalline order was investigated experimentally by infrared absorption spectroscopy for photon energies ranging from 0.2 - 1 eV. Distinct optical conductivity spectra were…

Materials Science · Physics 2015-05-18 Kin Fai Mak , Jie Shan , Tony F. Heinz

Recent studies have reported emergent ferroelectric behavior in twisted or moir\'e-engineered graphene-based van der Waals heterostructures, yet the microscopic origin of this effect remains under debate. Pristine mono- or few-layer…

We study the ground state properties of an ABA-stacked trilayer graphene. The low energy band structure can be described by a combination of both a linear and a quadratic particle-hole symmetric dispersions, reminiscent of monolayer- and…

Mesoscale and Nanoscale Physics · Physics 2012-03-08 Ralph van Gelderen , Lih-King Lim , C. Morais Smith

We report stimulated Raman spectroscopy of the G phonon in both single and multi-layer graphene, through Coherent anti-Stokes Raman Scattering (CARS). The signal generated by the third order nonlinearity is dominated by a vibrationally…

Mesoscale and Nanoscale Physics · Physics 2019-09-11 A. Virga , C. Ferrante , G. Batignani , D. De Fazio , A. D. G. Nunn , A. C. Ferrari , G. Cerullo , T. Scopigno

We construct a continuum model of twisted trilayer graphene using {\it ab initio} density-functional-theory calculations, and apply it to address twisted trilayer electronic structure. Our model accounts for moir\'e variation in site…

Mesoscale and Nanoscale Physics · Physics 2021-07-27 Chao Lei , Lukas Linhart , Wei Qin , Florian Libisch , Allan H. MacDonald

We investigated the low-frequency Raman spectra of freestanding few-layer graphene (FLG) at varying temperatures (400 - 900 K) controlled by laser heating. At high temperature, we observed the fundamental Raman mode for the lowest-frequency…

Mesoscale and Nanoscale Physics · Physics 2014-08-15 Chun Hung Lui , Zhipeng Ye , Courtney Keiser , Xun Xiao , Rui He

Terrace-sized, single-orientation graphene can be grown on top of a carbon buffer layer on silicon carbide by thermal decomposition. Despite its homogeneous appearance, a surprisingly large variation in electron transport properties is…

Mesoscale and Nanoscale Physics · Physics 2023-03-21 Tobias A. de Jong , Luuk Visser , Johannes Jobst , Ruud M. Tromp , Sense Jan van der Molen

We use an exact solution of the relaxation-time Boltzmann equation in a uniform AC electric field to describe the nonlinear optical response of graphene in the terahertz (THz). The cases of monolayer, bilayer and ABA-stacked trilayer…

Mesoscale and Nanoscale Physics · Physics 2014-09-23 N. M. R. Peres , Yu. V. Bludov , Jaime E. Santos , Antti-Pekka Jauho , M. I. Vasilevskiy

The novel graphene allotropes $\alpha$-, $\beta$-, and $\gamma$-graphyne derive from graphene by insertion of acetylenic groups. The three graphynes are the only members of the graphyne family with the same hexagonal symmetry as graphene…

Mesoscale and Nanoscale Physics · Physics 2013-08-28 Valentin N. Popov , Philippe Lambin

Raman spectroscopy has become an essential technique to characterize and investigate graphene and many other two-dimensional materials. However, there still lacks consensus on the Raman signature and phonon dispersion of atomically thin…

The zero energy modes induced by vacancies in ABC stacked trilayer graphene are investigated. Depending on the position of the vacancy, a new zero energy solution is realised, different from those obtained in multilayer compounds with…

Materials Science · Physics 2012-08-31 Eduardo V. Castro , M. Pilar López-Sancho , María A. H. Vozmediano

We developed the generalized tight-binding model to study the magneto-electronic properties of AAB-stacked trilayer graphene. Three groups of Landau levels (LLs) are characterized by the dominating subenvelope function on distinct…

Materials Science · Physics 2015-04-02 Thi-Nga Do , Chiun-Yan Lin , Yi-Ping Lin , Po-Hsin Shih , Ming-Fa Lin

We report the growth of thickness-controlled rotationally faulted multilayer graphene (rf-MLG) on Ni foils by low-pressure chemical vapor deposition and their characterization by micro-Raman spectroscopy. The surface morphology and…

Materials Science · Physics 2018-09-25 H. Kato , N. Itagaki , H. J. Im
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