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Electron capture and emission by Coulomb scattering in self-assembled quantum dot (QD) devices is studied theoretically. While the dependence of the Coulomb scattering (Auger) rates on the local wetting layer electron density has been a…

介观与纳米尺度物理 · 物理学 2009-11-10 R. Wetzler , A. Wacker , E. Sch"oll

Electron interactions are usually probed indirectly, through their impact on transport coefficients. Here we describe a direct scheme that, in principle, gives access to the full angle dependence of carrier scattering in 2D Fermi gases. The…

介观与纳米尺度物理 · 物理学 2018-10-18 Lev Haldar Kendrick , Patrick J Ledwith , Andrey Shytov , Leonid Levitov

We study the effects of Coulomb interaction between 2D Weyl fermions with anisotropic dispersion which displays relativistic dynamics along one direction and Newtonian dynamics along the other. Such a dispersion can be realized in…

强关联电子 · 物理学 2016-02-23 Hiroki Isobe , Bohm-Jung Yang , Andrey Chubukov , Jörg Schmalian , Naoto Nagaosa

We have investigated the transport characteristics of an electron pump consisting of an asymmetric double quantum dot at zero bias voltage which is subject to electromagnetic radiation. Depending on the energies of the intermediate states…

介观与纳米尺度物理 · 物理学 2008-02-03 T. H. Stoof , Yu. V. Nazarov

The proximity effect (PE) between superconductor and confined electrons can induce the effective pairing phenomena of electrons in nanowire or quantum dot (QD). Through interpreting the PE as an exchange of virtually quasi-excitation in a…

介观与纳米尺度物理 · 物理学 2014-04-04 Y. N. Fang , S. W. Li , L. C. Wang , C. P. Sun

We investigate collision dynamics involving two electrons and a quantum dot embedded in a quantum wire. One electron is initially at rest in the ground state of the dot, whereas the other electron is incident on the dot with a rather well…

量子物理 · 物理学 2013-03-13 Sølve Selstø

We report on the observation of a quenched moment of inertia as resulting from superfluidity in a strongly interacting Fermi gas. Our method is based on setting the hydrodynamic gas in slow rotation and determining its angular momentum by…

量子气体 · 物理学 2010-12-14 S. Riedl , E. R. Sanchez Guajardo , C. Kohstall , J. Hecker Denschlag , R. Grimm

Sperm swimming at low Reynolds number have strong hydrodynamic interactions when their concentration is high in vivo or near substrates in vitro. The beating tails not only propel the sperm through a fluid, but also create flow fields…

生物物理 · 物理学 2009-01-09 Yingzi Yang , Jens Elgeti , Gerhard Gompper

We investigate the existence of the electric field reversal in the negative glow of a dc discharge, its location, the width of the well trapping the electrons, the slow electrons scattering time, and as well the trapping time. Based on a…

等离子体物理 · 物理学 2007-05-23 Mario J. Pinheiro

By considering a correlated two-electron transport process (TET) and using a diagrammatic analysis within the Keldysh nonequilibrium Green's function formalism, we discuss a novel charge pump by which carriers are pumped from a contact with…

介观与纳米尺度物理 · 物理学 2009-11-07 Qing-feng Sun , Hong Guo , Jian Wang

Two interaction mechanisms of particles in a fluid are proposed on base of forces, mediated by hydrodynamic thermal fluctuations. The first one is similar to the conventional van der Waals interaction, but instead of been mediated by…

软凝聚态物质 · 物理学 2009-11-07 B. I. Ivlev

We describe an analytical theory investigating the regime of validity of the Fermi liquid theory in interacting, via the long-range Coulomb coupling, two-dimensional Fermi systems comparing it with with the corresponding 3D systems. We find…

强关联电子 · 物理学 2021-12-13 Sankar Das Sarma , Yunxiang Liao

The non-linear response of a beam splitter to the coincident arrival of interacting particles enables numerous applications in quantum engineering and metrology yet poses considerable challenge to achieve focused interactions on the…

We investigate electron pairing in the presence of the Berry curvature field that ubiquitously exists in ferromagnetic metals with spin-orbit coupling. We show that a sufficiently strong Berry curvature field on the Fermi surface can…

超导电性 · 物理学 2007-05-23 Junren Shi , Qian Niu

Coulomb repulsion between two moving electrons loses its spherical symmetry due to relativistic effects. In presence of a uniform positive ion background this asymmetry uncovers an angular dependent attraction potential in the direction of…

超导电性 · 物理学 2007-05-23 F. Raissi

We study the role of spin correlations in nonlinear absorption due to optical transitions from a deep impurity level to states above a Fermi sea. We demonstrate that the Hubbard repulsion between two electrons occupying the impurity state…

凝聚态物理 · 物理学 2009-10-31 T. V. Shahbazyan , I. E. Perakis , M. E. Raikh

We use numerical simulations to study the dynamics of surface discharges, which are common in high-voltage engineering. We simulate positive streamer discharges that propagate towards a dielectric surface, attach to it, and then propagate…

等离子体物理 · 物理学 2020-06-15 Xiaoran Li , Anbang Sun , Guanjun Zhang , Jannis Teunissen

The interplay between long-range and local Coulomb repulsion in strongly interacting electron systems is explored through a two-dimensional Hubbard-Wigner model. An unconventional metallic state is found in which collective low-energy…

强关联电子 · 物理学 2009-10-23 S. Fratini , J. Merino

Using low-temperature scanning tunneling spectroscopy applied to the Cs-induced two-dimensional electron system (2DES) on p-type InSb(110), we probe electron-electron interaction effects in the quantum Hall regime. The 2DES is decoupled…

介观与纳米尺度物理 · 物理学 2011-04-18 S. Becker , C. Karrasch , T. Mashoff , M. Pratzer , M. Liebmann , V. Meden , M. Morgenstern

We study the effects of induced interactions on the pairing gap, transition temperature and chemical potential of a quasi-two dimensional Fermi gas of atoms with spin-orbit coupling. We find that these mean-field parameters are…

量子气体 · 物理学 2015-12-15 H. Caldas , R. L. S. Farias , M. Continentino