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Very recently, the standard description of electrons in strained graphene has been completed by the explicit inclusion of the lattice deformation. Here, the effect of these lattice corrections is taken into account to find the mechanical…

介观与纳米尺度物理 · 物理学 2013-03-08 M. Oliva-Leyva , Gerardo G. Naumis

An analysis of electron transport in graphene is presented in the presence of various arrangement of delta-function like magnetic barriers. The motion through one such barrier gives an unusual non specular refraction leading to asymmetric…

介观与纳米尺度物理 · 物理学 2009-07-09 Sankalpa Ghosh , Manish Sharma

We investigate the contribution of charge puddles to the non-vanishing conductivity minimum in disordered graphene flakes at the charge neutrality point. For that purpose, we study systems with a geometry that suppresses the transmission…

介观与纳米尺度物理 · 物理学 2016-01-13 Leandro R. F. Lima , Caio H. Lewenkopf

Graphene has attracted significant interest both for exploring fundamental science and for a wide range of technological applications. Chemical vapor deposition (CVD) is currently the only working approach to grow graphene at wafer scale,…

We report on the structural and transport properties of the smallest dislocation loop in graphene, known as a flower defect. First, by means of advanced experimental imaging techniques, we deduce how flower defects are formed during…

The problem of both electron and phonon scattering by wedge disclination dipoles (WDD) is studied in the framework of the deformation potential approach. The exact analytical results for the mean free path are obtained within the Born…

材料科学 · 物理学 2016-08-31 S. E. Krasavin , V. A. Osipov

Motivated by the ever-improving performance of deep learning techniques, we design a mixed input convolutional neural network approach to predict transport properties in deformed nanoscale materials using a height map of deformations (from…

介观与纳米尺度物理 · 物理学 2022-09-09 Jack G. Nedell , Jonah Spector , Adel Abbout , Michael Vogl , Gregory A. Fiete

Keldysh nonequilibrium Green's function method is utilized to study theoretically the spin polarized transport through a graphene spin valve irradiated by a monochromatic laser field. It is found that the bias dependence of the differential…

介观与纳米尺度物理 · 物理学 2015-06-05 Kai-He Ding , Zhen-Gang Zhu , Jamal Berakdar

We discuss the physics of the tunable bandgap in bilayer graphene with the gate voltage and doping. A comparison with experimental data obtained by Kuzmenko et al [Phys. Rev. B \textbf{80}, 165406 (2009)] demonstrates the good agreement.

介观与纳米尺度物理 · 物理学 2010-11-29 L. A. Falkovsky

Electron properties of graphene are described in terms of Dirac fermions. Here we thoroughly outline the elastic scattering theory for the two-dimensional massive Dirac fermions in the presence of an axially symmetric potential. While the…

介观与纳米尺度物理 · 物理学 2011-11-10 D. S. Novikov

Graphene is known to show a significant photo-thermoelectric effect that can exceed its photovoltaic contribution. Here, by utilizing this effect, we demonstrate a photovoltage measurement of cyclotron resonance in a double-back-gated…

介观与纳米尺度物理 · 物理学 2018-09-07 Kei Kinoshita , Rai Moriya , Miho Arai , Satoru Masubuchi , Kenji Watanabe , Takashi Taniguchi , Tomoki Machida

The full counting statistics of the charge transport through an undoped graphene sheet in the presence of smooth disorder is studied. At the Dirac point both in clean and diffusive limits, transport properties of a graphene sample are…

介观与纳米尺度物理 · 物理学 2010-10-11 A. Schuessler , P. M. Ostrovsky , I. V. Gornyi , A. D. Mirlin

We employ the first-principles GW+Bethe Salpeter equation approach to study the electronic structure and optical absorption spectra of uniaxial strained graphene with many-electron effects included. Applied strain not only induces an…

材料科学 · 物理学 2015-05-30 Yufeng Liang , Shouting Huang , Li Yang

The unique terahertz properties of graphene has been identified for novel optoelectronic applications. In a graphene sample with bias voltage added, there is an enhanced absorption in the far infrared region and a diminished absorption in…

介观与纳米尺度物理 · 物理学 2017-05-18 Yuan Yang , Grigory Kolesov , Lucas Kocia , Eric J. Heller

Graphene has emerged as a paradigmatic material in condensed matter physics due to its exceptional electronic, mechanical, and thermal properties. A deep understanding of its thermoelectric transport behavior is crucial for the development…

介观与纳米尺度物理 · 物理学 2026-05-20 Juan A. Cañas , Daniel A. Bonilla , A. Martín-Ruiz

We present exact results for the electronic transport properties of graphene sheets connected to two metallic electrodes. Our results, obtained by transfer-matrix methods, are valid for all sheet widths and lengths. In the limit of large…

介观与纳米尺度物理 · 物理学 2015-06-03 Shijie Hu , Wei Du , Guiping Zhang , Miao Gao , Zhong-Yi Lu , Xiaoqun Wang

Chemical functionalization of graphene modifies the local electron density of the carbon atoms and hence electron transport. Measuring these changes allows for a closer understanding of the chemical interaction and the influence of…

介观与纳米尺度物理 · 物理学 2010-12-17 A. Jacobsen , F. M. Koehler , W. J. Stark , K. Ensslin

Using a semiclassical Boltzmann transport equation (BTE) approach, we derive analytical expressions for electric and thermoelectric transport coefficients of graphene in the presence and absence of a magnetic field. Scattering due to…

材料科学 · 物理学 2017-04-26 Arpan Kundu , Majed Alrefae , Timothy S. Fisher

We theoretically study absorption by an undoped graphene layer decorated with arrays of small particles. We discuss periodic and random arrays within a common formalism, which predicts a maximum absorption of $50\%$ for suspended graphene…

介观与纳米尺度物理 · 物理学 2014-02-24 T. Stauber , G. Gómez-Santos , F. Javier García de Abajo

Electronic and transport properties of bilayer heterostructure under light irradiation are of fundamental interest to improve functionality of optoelectronic devices. We theoretically study the modification of transport properties of…

介观与纳米尺度物理 · 物理学 2023-02-16 Pascal Stadler , Mikael Fogelström