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We study the scattering of graphene quasiparticles by topological defects, represented by holes, pentagons and heptagons. For the case of holes, we obtain the phase shift and found that at low concentration they appear to be irrelevant for…

强关联电子 · 物理学 2010-12-17 Jakson M. Fonseca , Winder A. Moura-Melo , Afranio R. Pereira

We study the scattering of graphene quasiparticles by topological defects, represented by holes, pentagons and heptagons. For holes, we found that at low concentration they give a negligible contribution to the resistivity. Whenever…

强关联电子 · 物理学 2011-08-05 J. M. Fonseca , W. A. Moura-Melo , A. R. Pereira

Theory of scattering of massive chiral fermions in bilayer graphene by radial symmetric potential is developed. It is shown that in the case when the electron wavelength is much larger than the radius of the potential the scattering…

介观与纳米尺度物理 · 物理学 2007-09-02 M. I. Katsnelson

This work examines the effect of disclinations on the scattering of quasipaticles in graphene with the presence of a topological defect. Using the tight-binding method, the electronic properties of graphene with disclination are described,…

介观与纳米尺度物理 · 物理学 2025-03-12 M. J. Bueno , G. Q. Garcia , A. M. de M. Carvalho , C. Furtado

It is shown that clustering of charged impurities on graphene can suppress their contribution to the resistivity by a large factor of about the number of impurities per cluster, while leaving the density dependence unchanged. If the cluster…

介观与纳米尺度物理 · 物理学 2009-05-25 M. I. Katsnelson , F. Guinea , A. K. Geim

In this study, we explore the ratchet effect in graphene with artificial, triangular scatterers from a theoretical standpoint. It is demonstrated that the skew scattering of carriers by such coherently oriented defects results in the…

介观与纳米尺度物理 · 物理学 2015-06-19 Sergei Koniakhin

We discuss various scattering mechanisms for Dirac fermions in single-layer graphene. It is shown that scattering on a short-range potential (due to, for example, neutral impurities) is mostly irrelevant for electronic quality of graphene,…

介观与纳米尺度物理 · 物理学 2007-12-06 M. I. Katsnelson , A. K. Geim

Understanding phonon scattering by topological defects in graphene is of particular interest for thermal management in graphene-based devices. We present a study that quantifies the roles of the different mechanisms governing defect phonon…

材料科学 · 物理学 2016-11-04 Ziming Zhu , Xiaolong Yang , Mingyuan Huang , Qingfeng He , Guang Yang , Zhao Wang

In an ideal graphene sheet charge carriers behave as two-dimensional (2D) Dirac fermions governed by the quantum mechanics of massless relativistic particles. This has been confirmed by the discovery of a half-integer quantum Hall effect in…

材料科学 · 物理学 2015-05-13 Yuanbo Zhang , Victor W. Brar , Caglar Girit , Alex Zettl , Michael F. Crommie

We investigate the transmissions of fermions through gapped graphene structures by employing a combination of double barrier tilting and a time-oscillating potential. The latter introduces additional sidebands into the transmission…

介观与纳米尺度物理 · 物理学 2024-05-28 Miloud Mekkaoui , Ahmed Jellal , Abderrahim El Mouhafid

We have studied electron scattering by out-of-plane (flexural) phonon modes in doped suspended graphene and its effect on charge transport. In the free-standing case (absence of strain) the flexural branch shows a quadratic dispersion…

材料科学 · 物理学 2012-09-14 Héctor Ochoa , Eduardo V. Castro , M. I. Katsnelson , F. Guinea

The recent experimental observations of designer Dirac Fermions and topological phases in molecular graphene are addressed theoretically. Using scattering theory we calculate the electronic structure of finite lattices of scattering centers…

介观与纳米尺度物理 · 物理学 2013-12-18 H. Hammar , P. Berggren , J. Fransson

We analyze the scattering sector of the Hamiltonians for both gapless and gapped graphene in the presence of a charge impurity using the 2D Dirac equation, which is applicable in the long wavelength limit. We show that for certain range of…

介观与纳米尺度物理 · 物理学 2011-04-07 Kumar S. Gupta , Andjelo Samsarov , Siddhartha Sen

We study the propagation of electrons in a circular quantum dot of gapped graphene subject to the magnetic flux $\phi$. We present analytical expressions for the eigenstates, scattering coefficients, scattering efficiency and radial…

介观与纳米尺度物理 · 物理学 2020-06-16 Bouchaib Lemaalem , Abdelhadi Belouad , Miloud Mekkaoui , Ahmed Jellal

The effect of Coulomb scattering on graphene conductivity in field effect transistor structures is discussed. Inter-particle scattering (electron-electron, hole-hole, and electron-hole) and scattering on charged defects are taken into…

介观与纳米尺度物理 · 物理学 2009-11-13 V. Vyurkov , V. Ryzhii

We study the low-energy electronic transport across periodic extended defects in graphene. In the continuum low-energy limit, such defects act as infinitesimally thin stripes separating two regions where Dirac Hamiltonian governs the…

介观与纳米尺度物理 · 物理学 2012-12-14 J. N. B. Rodrigues , N. M. R. Peres , J. M. B. Lopes dos Santos

A theoretical study is presented on the scattering of graphene surface plasmons by defects in the graphene sheet they propagate in. These defects can be either natural (as domain boundaries, ripples and cracks, among others) or induced by…

介观与纳米尺度物理 · 物理学 2013-05-31 Juan L. Garcia-Pomar , Alexey Yu. Nikitin , Luis Martin-Moreno

Inelastic phonon scattering in graphene field-effect transistors (FETs) is studied by numerically solving the Boltzmann transport equation in three dimensional real and phase spaces (x, kx, ky). A kink behavior due to ambipolar transport…

介观与纳米尺度物理 · 物理学 2015-05-27 Jyotsna Chauhan , Jing Guo

The electron scattering by the short-range defects in the monolayer graphene is considered in the framework of the flatland model. We analyze the effect of this scattering on the electronic resistivity of the monolayer graphene (direct…

介观与纳米尺度物理 · 物理学 2018-10-10 N Firsova , S Ktitorov

Graphitic nitrogen-doped graphene is an excellent platform to study scattering processes of massless Dirac fermions by charged impurities, in which high mobility can be preserved due to the absence of lattice defects through direct…

介观与纳米尺度物理 · 物理学 2017-06-05 Jiayu Li , Li Lin , Dingran Rui , Qiucheng Li , Jincan Zhang , Ning Kang , Yanfeng Zhang , Hailin Peng , Zhongfan Liu , H. Q. Xu
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