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A theoretical model is proposed to describe asymmetric gate-voltage dependence of conductance and noise in two-terminal ballistic graphene devices. The model is analyzed independently within the self-consistent Hartree and Thomas-Fermi…

Mesoscale and Nanoscale Physics · Physics 2011-07-08 W. -R. Hannes , M. Jonson , M. Titov

The electron hole asymmetry has been measured in natural graphite using magneto-optical absorption measurements. A splitting is observed for the transitions at both the $K$-point and the $H$-point of the Brillouin zone of graphite where the…

Mesoscale and Nanoscale Physics · Physics 2011-11-14 P. Plochocka , P. Y. Solane , R. J. Nicholas , J. M. Schneider , B. A. Piot , D. K. Maude , O. Portugall , G. L. J. A. Rikken

In the recent years many researches were performed about graphene. Graphene is always considered a half metal or a zero gap semiconductor. In the last year new experiments were done about graphene on boron nitride and they obtained an…

Mesoscale and Nanoscale Physics · Physics 2015-08-11 Salvatore Croce

While electron kinetic effects are well known to be of fundamental importance in several situations, the electron mean-flow inertia is often neglected when lengthscales below the electron skin depth become irrelevant. This has led to the…

Plasma Physics · Physics 2017-06-13 Enrico Camporeale , Cesare Tronci

The pseudo-potential method is applied to derive diverse propagating electron hole structures, in a nonthermal or $\kappa$ particle distribution function background. The associated distribution function Ansatz reproduces the Schamel…

Plasma Physics · Physics 2021-08-11 Fernando Haas

Based on now historical magnetic and plasma data and available wave spectra from the AMPTE-IRM spacecraft, and on as well historical Equator-S high-cadence magnetic field observations of mirror modes in the magnetosheath near the dayside…

Space Physics · Physics 2018-11-29 R. A. Treumann , W. Baumjohann

Efforts at modelling the propagation of seismic waves in half-spaces with continuously varying properties have been mostly focused on shear-horizontal waves. Here a sagittaly polarized (Rayleigh type) wave travels along a symmetry axis (and…

Geophysics · Physics 2007-11-29 Michel Destrade

Metamaterials with tunable optical properties provide a versatile platform for controlling electromagnetic interactions at the nanoscale. This study explores the anisotropic thermal behavior of metamaterials composed of planar plates…

Advances in the ability to manipulate free electron phase profiles within the electron microscope have spurred development of quantum-mechanical descriptions of electron energy loss (EEL) processes involving transitions between phase-shaped…

Mesoscale and Nanoscale Physics · Physics 2024-02-09 Marc R. Bourgeois , Austin G. Nixon , Matthieu Chalifour , David J. Masiello

We demonstrate by spin quantum beat spectroscopy that in undoped symmetric (110)-oriented GaAs/AlGaAs single quantum wells even a symmetric spatial envelope wavefunction gives rise to an asymmetric in-plane electron Land\'e-g-factor. The…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 J. Hübner , S. Kunz , S. Oertel , D. Schuh , M. Pochwała , H. T. Duc , J. Förstner , T. Meier , M. Oestreich

Hawking radiation is often intuitively visualized as particles that have tunneled across the horizon. Yet, at first sight, it is not apparent where the barrier is. Here I show that the barrier depends on the tunneling particle itself. The…

High Energy Physics - Theory · Physics 2008-11-26 Maulik K. Parikh

We investigate the temporal evolution of an axisymmetric magnetosphere around a rapidly rotating, stellar-mass black hole, applying a two-dimensional particle-in-cell simulation scheme. Adopting a homogeneous pair production, and assuming…

High Energy Astrophysical Phenomena · Physics 2021-02-24 Kouichi Hirotani , Ruben Krasnopolsky , Hsien Shang , Ken-ichi Nishikawa , Michael Watson

The helical Dirac states on the surface of a topological insulator are protected by topology and display significant particle-hole asymmetry. This asymmetry arises from a subdominant Schr\"{o}dinger type contribution to the Hamiltonian…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 Zhou Li , J. P. Carbotte

In this paper, we extend the multiscale approach developed in [Abel et. al., Rep. Prog. Phys., submitted] by exploiting the scale separation between ions and the electrons. The gyrokinetic equation is expanded in powers of the electron to…

Plasma Physics · Physics 2013-03-01 I. G. Abel , S. C. Cowley

We extend the semiclassical two-step model [Phys. Rev. A 94, 013415 (2016)] to include a multielectron polarization-induced dipole potential. Using this model we investigate the imprints of multielectron effects in the momentum…

Atomic Physics · Physics 2018-08-22 N. I. Shvetsov-Shilovski , M. Lein , L. B. Madsen

Magnetic fields lines are trapped in black hole event horizons by accreting plasma. If the trapped field lines are lightly loaded with plasma, then their motion is controlled by their footpoints on the horizon and thus by the spin of the…

High Energy Astrophysical Phenomena · Physics 2021-06-23 George N. Wong , Yufeng Du , Ben S. Prather , Charles F. Gammie

Questions regarding energy dissipation in astrophysical jets are open to date, despite of numerous attempts to limit the diversity of models. Some of the most popular models assume that energy is transferred to particles via internal…

High Energy Astrophysical Phenomena · Physics 2023-04-24 Patryk Pjanka , Camilia Demidem , Alexandra Veledina

Trapped samples of ultracold molecules are often short-lived, because close collisions between them result in trap loss. We investigate the use of shielding with static electric fields to create repulsive barriers between polar molecules to…

Quantum Gases · Physics 2024-02-20 Bijit Mukherjee , Jeremy M. Hutson

We calculate circularly polarized luminescence emitted parallel (vertical emission) and perpendicular (edge emission) to the growth direction from a quantum well in a spin light-emitting diode (spin-LED) when either the holes or electrons…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Z. G. Yu , W. H. Lau , M. E. Flatte'

Reduced fluid models including electron inertia and ion finite Larmor radius corrections are derived asymptotically, both from fluid basic equations and from a gyrofluid model. They apply to collisionless plasmas with small ion-to-electron…

Plasma Physics · Physics 2022-02-02 Thierry Passot , Pierre-Louis Sulem , Emanuele Tassi
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