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We calculate the charge susceptibility and the linear and differential conductances of a double quantum dot coupled to two metallic reservoirs both at equilibrium and when the system is driven away from equilibrium. This work is motivated…

介观与纳米尺度物理 · 物理学 2018-10-16 V. Talbo , M. Lavagna , T. Q. Duong , A. Crépieux

We demonstrate a new class of molecules for exceptional performance in molecular electronics and spintronics. Phenalenyl-based radicals are stable radicals whose electronic properties can be tuned readily by heteroatom substitution. We…

介观与纳米尺度物理 · 物理学 2021-11-24 Manuel Smeu , Oliver L. A. Monti , Dominic McGrath

Using the fiber bundle concept developed in geometry and topology, the fractionally quantized Hall conductivity is discussed in the relevant many--particle configuration space. Electron-magnetic field and electron-electron interactions…

凝聚态物理 · 物理学 2016-08-31 T. Asselmeyer , R. Keiper

We investigate the effects of lateral interactions on the conductance of two molecules connected in parallel to semi-infinite leads. The method we use combines a Green function approach to quantum transport with density functional theory…

介观与纳米尺度物理 · 物理学 2009-09-29 Rui Liu , San-Huang Ke , Harold U. Baranger , Weitao Yang

We propose that two-channel orbital Kondo ``spin'' 1/2 conductance can be measured in a quantum dot at Coulomb Blockade with an odd number of electrons with contacts in a pillar configuration, if an orthogonal magnetic field induces an…

介观与纳米尺度物理 · 物理学 2009-11-07 Domenico Giuliano , Benoit Jouault , Arturo Tagliacozzo

We discuss the quasiclassical Green function method for a two-dimensional electron gas in the presence of spin-orbit coupling, with emphasis on the meaning of the $\xi$-integration procedure. As an application of our approach, we…

介观与纳米尺度物理 · 物理学 2009-11-13 Cosimo Gorini , Peter Schwab , Michael Dzierzawa , Roberto Raimondi

Electron transport through a double quantum dot system is studied with taking into account electron-phonon interaction. The Keldysh nonequilibrium Green function formalism is used to compute the current and transmission coefficient of the…

介观与纳米尺度物理 · 物理学 2012-04-11 M. Bagheri Tagani , H. Rahimpour Soleimani

We present a generalized approach for computing electron conductance and I-V characteristics in multiterminal junctions from first-principles. Within the framework of Keldysh theory, electron transmission is evaluated employing an O(N)…

材料科学 · 物理学 2015-05-13 Kamal K. Saha , Wenchang Lu , J. Bernholc , Vincent Meunier

We study electron transport properties of some molecular wires and a unconventional disordered thin film within the tight-binding framework using Green's function technique. We show that electron transport is significantly affected by…

介观与纳米尺度物理 · 物理学 2009-06-29 Santanu K. Maiti

We use the effective-mass approximation and the density-functional theory with the local-density approximation for modeling two-dimensional nano-structures connected phase-coherently to two infinite leads. Using the non-equilibrium Green's…

介观与纳米尺度物理 · 物理学 2009-11-10 Paula Havu , Ville Havu , Martti Puska , Risto Nieminen

A recursive Green's function technique is developed to calculate the spin-dependent conductance in mesoscopic structures. Using this technique, we study the spin-dependent electronic transport of quantum point contacts in the presence of…

介观与纳米尺度物理 · 物理学 2009-11-07 Shi-Liang Zhu , Z. D. Wang , Lian Hu

Non-equilibrium Green's functions (NEGF) formalism combined with extended Huckel (EHT) and charging model are used to study electrical conduction through single-molecule junctions. Analyzed molecular complex is composed of asymmetric…

介观与纳米尺度物理 · 物理学 2009-11-11 Kamil Walczak , Sergey Edward Lyshevski

We consider electronic transport through break-junctions bridged by a single molecule in the Kondo regime. We describe the system by a two-channel Anderson model. We take the tunneling matrix elements to depend on the position of the…

介观与纳米尺度物理 · 物理学 2015-05-13 Jernej Mravlje , Anton Ramsak

We investigate the electron-transport properties of ethyne-bridged diphenyl zinc-porphyrin molecules suspended between gold (111) electrodes by first-principles calculations within the framework of density functional theory. It is found…

材料科学 · 物理学 2024-01-09 Huy Duy Nguyen , Tomoya Ono

We consider a two-dimensional electron system subjected to a short-ranged nonmagnetic disorder potential, Coulomb interactions, and Rashba spin-orbit coupling. The path-integral approach incorporated within the Keldysh formalism is used to…

介观与纳米尺度物理 · 物理学 2022-12-07 Maxim Dzero , Alex Levchenko

A double-quantum-dot coupled to electrodes with spin-dependent splitting of chemical potentials (spin bias) is investigated theoretically by means of the Green's functions formalism. By applying a large spin bias, the quantum spin in a…

介观与纳米尺度物理 · 物理学 2008-06-16 Hai-Zhou Lu , Shun-Qing Shen

We study the spin-charge coupled transport in a two-dimensional electron system using the method of quasiclassical ($\xi$-integrated) Green's functions. In particular we derive the Eilenberger equation in the presence of a generic…

介观与纳米尺度物理 · 物理学 2007-05-23 Roberto Raimondi , Cosimo Gorini , Peter Schwab , Michael Dzierzawa

Measurement and theory of the two-terminal conductance of monolayer and bilayer graphene in the quantum Hall regime are compared. We examine features of conductance as a function of gate voltage that allow monolayer, bilayer, and gapped…

介观与纳米尺度物理 · 物理学 2009-07-24 J. R. Williams , D. A. Abanin , L. DiCarlo , L. S. Levitov , C. M. Marcus

We study the magnetic field dependences of the conductivity in heavily doped, strongly disordered 2D quantum well structures within wide conductivity and temperature ranges. We show that the exact analytical expression derived in our…

无序系统与神经网络 · 物理学 2011-06-21 S. A. Alavi , A. Tatar

Tunneling of electrons through rotor-stator anthracene aldehyde molecular interfaces is studied with a combined ab initio and model approach. Molecular electronic structure calculated from first principles is utilized to model different…

化学物理 · 物理学 2016-05-27 Irina Petreska , Vladimir Ohanesjan , Ljupco Pejov , Ljupco Kocarev