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We model one-dimensional transport through each open channel of a quantum wire by a Luttinger liquid with three different interaction parameters for the leads, the contact regions and the wire, and with two barriers at the contacts. We show…

强关联电子 · 物理学 2009-10-31 Siddhartha Lal , Sumathi Rao , Diptiman Sen

We calculate non-perturbatively the inelastic effects on the conductance through a conjugated molecular wire-metal heterojunction, including realistic electron-phonon coupling. We show that at sub-band-gap energies the current is dominated…

材料科学 · 物理学 2009-10-31 H. Ness , A. J. Fisher

We analyze the transport properties of a Luttinger liquid with an imbedded impurity of explicitly time-dependent strength. We employ a radiative boundary condition formalism to describe the coupling to the voltage sources. Assuming the…

强关联电子 · 物理学 2007-09-22 T. L. Schmidt , A. Komnik

Electron transport in a quantum wire with leads is investigated with actual Coulomb interaction taken into account. The latter includes both the direct interaction of electrons with each other and their interaction via the image charges…

介观与纳米尺度物理 · 物理学 2009-10-31 V. A. Sablikov , B. S. Shchamkhalova

In two-dimensional electron systems, plasmons are gapless and long-lived collective excitations of propagating charge density oscillations. We study the fluctuation mechanism of plasmon-assisted transport in the regime of electron…

介观与纳米尺度物理 · 物理学 2023-12-15 Dmitry Zverevich , Alex Levchenko

We study the influence of spin on the quantum interference of interacting electrons in a single-channel disordered quantum wire within the framework of the Luttinger liquid (LL) model. The nature of the electron interference in a spinful LL…

强关联电子 · 物理学 2008-11-08 A. G. Yashenkin , I. V. Gornyi , A. D. Mirlin , D. G. Polyakov

A noninteracting quantum-dot array side-coupled to a quantum wire is studied. Transport through the quantum wire is investigated by using a noninteracting Anderson tunneling Hamiltonian. The conductance at zero temperature develops an…

介观与纳米尺度物理 · 物理学 2009-11-07 P. A. Orellana , F. Dominguez-Adame , I. Gomez , M. L. Ladron de Guevara

Sufficiently large electric current applied to metallic nanostructures can bring them far out-of-equilibrium, resulting in non-Ohmic behaviors characterized by current-dependent resistance. We experimentally demonstrate a linear dependence…

介观与纳米尺度物理 · 物理学 2020-03-25 Guanxiong Chen , Ryan Freeman , Andrei Zholud , Sergei Urazhdin

Electronic transport in a model molecular device coupled to local phonon modes is theoretically analyzed. The method allows for obtaining an accurate approximation of the system's quantum state irrespective of the electron and phonon energy…

介观与纳米尺度物理 · 物理学 2007-10-10 Antonino La Magna , Ioannis Deretzis

We investigate nonlinear thermoelectric transport through quantum impurity systems with strong on-site interactions. We show that the steady-state transport through interacting quantum impurities in contact with electron reservoirs at…

强关联电子 · 物理学 2014-01-03 Prasenjit Dutt , Karyn Le Hur

We study ensembles of fermionic cold-atom quantum wires with tunable transverse mode population and single-wire resolution. From in situ density profiles, we determine the temperature of the atomic wires in the weakly interacting limit and…

Understanding heat transport in organic semiconductors is of fundamental and practical relevance. Therefore, we study the lattice thermal conductivities of a series of (oligo)acenes, where an increasing number of rings per molecule leads to…

材料科学 · 物理学 2024-12-09 Lukas Legenstein , Lukas Reicht , Sandro Wieser , Michele Simoncelli , Egbert Zojer

We consider scattering and transport in interacting quantum wires that are connected to leads. Such a setup can be represented by a minimal model of interacting fermions with inhomogeneities in the form of sudden changes in interaction…

强关联电子 · 物理学 2012-09-10 N. Sedlmayr , J. Ohst , I. Affleck , J. Sirker , S. Eggert

We review a series of works describing thermoelectric effects in gated disordered nanowires (field effect transistor device configuration). After considering the elastic coherent regime characterizing sub-Kelvin temperatures, we study the…

介观与纳米尺度物理 · 物理学 2017-07-06 Riccardo Bosisio , Geneviève Fleury , Cosimo Gorini , J. -L Pichard

The anomalous behavior of electron induced phonon transport is investigated using an Anderson-Holstein based dissipative quantum dot setup under two relevant bias situations: (a) a voltage bias in the absence of an electronic temperature…

介观与纳米尺度物理 · 物理学 2018-11-30 Bitan De , Bhaskaran Muralidharan

The first order standard perturbation theory combined with ab initio projector augmented wave operator challenges the realization of the standard Sternheimer equation with linear computational efficiency. This efficiency motivates us to…

材料科学 · 物理学 2018-10-05 Sushant Kumar Behera , Pritam Deb

We measure hole transport in poly(3-hexylthiophene) field effect transistors with channel lengths from 3 $\mu$m down to 200 nm, from room temperature down to 10 K. Near room temperature effective mobilities inferred from linear regime…

介观与纳米尺度物理 · 物理学 2007-05-23 B. H. Hamadani , D. Natelson

We compute both electron- and phonon transmissions in thin disordered silicon nanowires. Our atomistic approach is based on tight-binding and empirical potential descriptions of the electronic and phononic systems, respectively. Surface…

介观与纳米尺度物理 · 物理学 2009-11-13 Troels Markussen , Antti-Pekka Jauho , Mads Brandbyge

Using the Landauer formulation of transport theory, we predict that dielectric quantum wires should exhibit quantized thermal conductance at low temperatures in a ballistic phonon regime. The quantum of thermal conductance is universal,…

介观与纳米尺度物理 · 物理学 2009-10-31 Luis G. C. Rego , George Kirczenow

We study electronic transport through a strongly interacting quantum dot by using the finite temperature extension of Wilson's numerical renormalization group (NRG) method. This allows the linear conductance to be calculated at all…

强关联电子 · 物理学 2007-05-23 T. A. Costi