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Electrical conduction through a two-terminal molecular device is studied using non-equilibrium Green's functions (NEGF) formalism. Such junction is made of a short linear wire which is connected to the metallic electrodes. Molecule itself…

介观与纳米尺度物理 · 物理学 2007-05-23 Kamil Walczak

Coulomb drag experiments have been an essential tool to study strongly interacting low-dimensional systems. Historically, this effect has been explained in terms of momentum transfer between electrons in the active and the passive layer.…

介观与纳米尺度物理 · 物理学 2024-02-05 R. Makaju , H. Kassar , S. M. Daloglu , A. Huynh , A. Levchenko , S. J. Addamane , D. Laroche

We consider a metallic wire coupled to two metallic electrodes via two junctions placed nearby. A bias voltage applied to one of such junctions alters the electron distribution function in the wire in the vicinity of another junction thus…

强关联电子 · 物理学 2012-03-09 D. S. Golubev , A. D. Zaikin

One-dimensional (1D) quantum wires provide a versatile platform for studying strong electron-electron interactions and collective excitations under confinement. Coulomb drag between 1D systems offers a powerful probe of Tomonaga-Luttinger…

介观与纳米尺度物理 · 物理学 2026-03-24 Mingyang Zheng , Rebika Makaju , Rasul Gazizulin , Alex Levchenko , Sadhvikas J. Addamane , Dominique Laroche

We propose a local, O(N) molecular dynamics algorithm for the simulation of charged systems. The long ranged Coulomb potential is generated by a propagating electric field that obeys modified Maxwell equations. On coupling the…

软凝聚态物质 · 物理学 2009-11-10 Jörg Rottler , A. C. Maggs

We report transport measurements on a semiconductor quantum dot with a small number of confined electrons. In the Coulomb blockade regime, conduction is dominated by cotunneling processes. These can be either elastic or inelastic, depending…

介观与纳米尺度物理 · 物理学 2009-10-31 S. De Franceschi , S. Sasaki , J. M. Elzerman , W. G. van der Wiel , S. Tarucha , L. P. Kouwenhoven

We study the effect of Coulomb interactions on the conductance of a single-mode quantum wire connecting two bulk leads. When the density of electrons in the wire is very low, they arrange in a finite-length Wigner crystal. In this regime…

介观与纳米尺度物理 · 物理学 2010-07-23 K. A. Matveev

We consider two three-dimensional isotropic harmonic oscillators interacting with the quantum electromagnetic field in the Coulomb gauge and within dipole approximation. Using a Bogoliubov-like transformation, we can obtain transformed…

量子物理 · 物理学 2009-11-11 F. Ciccarello , E. Karpov , R. Passante

We consider the transport spectroscopy of a quantum dot with an even number of electrons at finite bias voltage within the Coulomb blockade diamond. We calculate the tunneling current due to the elastic and inelastic co-tunneling processes…

介观与纳米尺度物理 · 物理学 2007-05-23 M. R. Wegewijs , Yu. V. Nazarov

We present an analytic ansatz to find the effective electrostatic potential and Coulomb correlations in multicenter problems, specifically homogeneous and doped clusters of metal atoms. The approach is based on a quasi-classical…

化学物理 · 物理学 2007-05-23 F. Despa , R. S. Berry

We investigate the role of charging effects in a voltage-biased quantum wire. Both the finite range of the Coulomb interaction and the long-ranged nature of the Friedel oscillation imply a finite capacitance, leading to a charging energy.…

介观与纳米尺度物理 · 物理学 2009-10-30 Reinhold Egger , Hermann Grabert

We study theoretically electronic transport through a contact of a quantum wire with 2D or 3D leads and find that if the contact is not smooth and adiabatic then the conduction is strongly suppressed below a threshold voltage $V_T$, while…

介观与纳米尺度物理 · 物理学 2015-10-01 S. N. Artemenko , P. P. Aseev , D. S. Shapiro

Based on the extended optical model approach in which the polarization potential is decomposed into direct reaction (DR) and fusion parts, simultaneous $\chi^{2}$ analyses are performed for elastic scattering and fusion cross section data…

核理论 · 物理学 2009-11-11 W. Y. So , T. Udagawa , K. S. Kim , S. W. Hong , B. T. Kim

We consider resonant transmission through a finite-length quantum wire connected to leads via finite transparency junctions. The coherent electron transport is strongly modified by the Coulomb interaction. The low-temperature…

介观与纳米尺度物理 · 物理学 2009-11-13 N. B. Kopnin , Y. M. Galperin , V. M. Vinokur

Dielectric interfaces are crucial to the behavior of charged membranes, from graphene to synthetic and biological lipid bilayers. Understanding electrolyte behavior near these interfaces remains a challenge, especially in the case of rough…

软凝聚态物质 · 物理学 2024-04-03 Nicholas Pogharian , Alexandre P. dos Santos , Ali Ehlen , Monica Olvera de la Cruz

As it is well known there may arise situations when an interaction between electrons is attractive. A weak attraction should manifest itself strongly in 1D systems, since it can create two-electron bound states. This paper interprets the…

介观与纳米尺度物理 · 物理学 2009-10-31 V. V. Flambaum , M. Yu. Kuchiev

We investigate the statistical mechanics of an inhomogeneous Coulomb fluid composed of charged particles with static polarizability. We derive the weak- and the strong-coupling approximations and evaluate the partition function in a planar…

软凝聚态物质 · 物理学 2013-04-22 Vincent Démery , David S. Dean , Rudolf Podgornik

Current auto- and cross-correlations are studied in a system of two capacitively coupled quantum dots. We are interested in a role of Coulomb interaction in dynamical correlations, which occur outside the Coulomb blockade region (for high…

介观与纳米尺度物理 · 物理学 2015-05-13 Grzegorz Michalek , Bogdan R. Bulka

We use a simple electrostatic treatment to model recent experiments on quantum Hall systems, in which charging of localised states by addition of integer or fractionally-charged quasiparticles is observed. Treating the localised state as a…

介观与纳米尺度物理 · 物理学 2008-06-17 Ana L. C. Pereira , J. T. Chalker

We study electron transport through a system of two lateral quantum dots coupled in series. We consider the case of weak coupling to the leads and a bias point in the Coulomb blockade. After a generalized Schrieffer-Wolf transformation,…

介观与纳米尺度物理 · 物理学 2009-11-07 Udo Hartmann , Frank K. Wilhelm