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Photon-assisted charge transport through a double barrier laser structure, separated by a region assisted by a magnetic field, is studied. Employing Floquet theory and matrix formalism, the transmission probabilities for the central band…

Mesoscale and Nanoscale Physics · Physics 2024-10-18 Rachid El Aitouni , Miloud Mekkaoui , Abdelhadi Bahaoui , Ahmed Jellal

We consider longitudinal electronic transport in a graphene monolayer with an external in-plane magnetic field and with extrinsic spin-orbit Rashba interaction. Our main interest is in the in-plane magnetoresistance, observed…

Mesoscale and Nanoscale Physics · Physics 2024-10-29 S. Kudła , V. K. Dugaev , J. Barnaś , A. Dyrdał

The nonlinear magneto-optic responses are investigated for gapped graphene and doped graphene in a perpendicular magnetic field. The electronic states are described by Landau levels, and the electron dynamics in an optical field is obtained…

Materials Science · Physics 2018-03-21 J. L. Cheng , C. Guo

At low temperatures, quantum corrections, originating from the interference of the many paths an electron may take between two points, tend to dominate the transport properties of two-dimensional conductors. These quantum corrections…

Mesoscale and Nanoscale Physics · Physics 2023-04-20 Frederico Sousa , David T. S. Perkins , Aires Ferreira

We report measurements of the effects of a random vector potential generated by applying an in-plane magnetic field to a graphene flake. Magnetic flux through the ripples cause orbital effects: phase-coherent weak localization is…

Mesoscale and Nanoscale Physics · Physics 2010-11-02 Mark B. Lundeberg , Joshua A. Folk

We develop a microscopic theory of a strong electromagnetic field interaction with gated bilayer graphene. Quantum kinetic equations for density matrix are obtained using a tight binding approach within second quantized Hamiltonian in an…

Mesoscale and Nanoscale Physics · Physics 2017-05-24 A. A. Avetisyan , A. P. Djotyan , K. Moulopoulos

A two-dimensional (2D) dislocation continuum theory is being introduced. The present theory adds elastic rotation, dislocation density, and background stress to the classical energy density of elasticity. This theory contains four material…

Mesoscale and Nanoscale Physics · Physics 2015-10-15 Markus Lazar

Based on the time-dependent nonequilibrium Green's function method we investigate theoretically the time and spin-dependent transport through a graphene layer upon the application of a static bias voltage to the electrodes and a…

Mesoscale and Nanoscale Physics · Physics 2011-09-23 Kai-He Ding , Zhen-Gang Zhu , Jamal Berakdar

By means of variable moment kernel polynomial method, we analyze the localization properties of $\beta$-graphyne sheet subjected to the Anderson disorder. To detect the localization transition we focus on the scaling behavior of the…

Materials Science · Physics 2021-01-20 G. X. Wang

Zero energy states in the Dirac spectrum with U(1) symmetric massive vortices of various underlying insulating orders in strained graphene are constructed in the presence of the magnetic field. An easy plane vortex of antiferromagnet and…

Mesoscale and Nanoscale Physics · Physics 2012-05-07 Bitan Roy

A simple criterion is provided how the (anti-)localization properties of graphene are determined in the presence of inter-valley scattering, Kane-Mele topological mass term, and Rashba spin-orbit interaction (SOI). A set of (pseudo)…

Mesoscale and Nanoscale Physics · Physics 2010-01-25 Ken-Ichiro Imura , Yoshio Kuramoto , Kentaro Nomura

Transport properties through wide and short ballistic graphene junctions are studied in the presence of arbitrary dopings and magnetic fields. No dependence on the magnetic field is observed at the Dirac point for any current cumulant, just…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Elsa Prada , Pablo San-Jose , Bernhard Wunsch , Francisco Guinea

Graphene revealed a number of unique properties beneficial for electronics. However, graphene does not have an energy band-gap, which presents a serious hurdle for its applications in digital logic gates. The efforts to induce a band-gap in…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 Guanxiong Liu , Sonia Ahsan , Alexander G. Khitun , Roger K. Lake , Alexander A. Balandin

The problem of electrostatic screening of a charged line by undoped or weakly doped graphene is treated beyond the linear-response theory. The induced electron density is found to be approximately doping independent, n(x)~(log x)^2/x^2, at…

Mesoscale and Nanoscale Physics · Physics 2015-06-24 Bor-Yuan Jiang , Michael M. Fogler

Unlike the more common local conductance spectroscopy, nonlocal conductance can differentiate between nontopological zero-energy modes localized around inhomogeneities, and true Majorana edge modes in the topological phase. In particular,…

Mesoscale and Nanoscale Physics · Physics 2020-12-09 Nadina Gheorghiu , Charles R. Ebbing , Benjamin T. Pierce , Timothy J. Haugan

A graphene sheet biased with a drift electric current offers a tantalizing opportunity to attain unidirectional, backscattering-immune, and subwavelength light propagation, as proposed in [T. A. Morgado, M. G. Silveirinha, ACS Photonics…

Mesoscale and Nanoscale Physics · Physics 2020-08-12 Tiago A. Morgado , Mário G. Silveirinha

The effect of electronic interactions in graphene with vacancies or resonant scatterers is investigated. We apply dynamical mean-field theory in combination with quantum Monte Carlo simulations, which allow us to treat non-perturbatively…

Mesoscale and Nanoscale Physics · Physics 2011-06-29 P. Haase , S. Fuchs , T. Pruschke , H. Ochoa , F. Guinea

We report the observation of the Goos-H\"anchen effect in graphene via a weak value amplification scheme. We demonstrate that the amplified Goos-H\"anchen shift in weak measurements is sensitive to the variation of graphene layers.…

Optics · Physics 2017-02-06 Shizhen Chen , Chengquan Mi , Liang Cai , Mengxia Liu , Hailu Luo , Shuangchun Wen

In order to investigate the interaction between single vacancies in a graphene sheet, we have used spin-polarized density functional theory (DFT). Two distinct configurations were considered, either with the two vacancies located in the…

Mesoscale and Nanoscale Physics · Physics 2016-06-22 Wanderla L. Scopel , Wendel S. Paz , Jair C. C. Freitas

Graphene exhibits extremely strong optical nonlinearity when a strong perpendicular magnetic field is applied, the response current shows strong field dependence even for moderate light intensity, and the perturbation theory fails. We…

Mesoscale and Nanoscale Physics · Physics 2018-05-09 J. L. Cheng , C. Guo
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