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A numerical renormalization-group study of the conductance through a quantum wire side-coupled to a quantum dot is reported. The temperature and the dot-energy dependence of the conductance are examined in the light of a recently derived…

介观与纳米尺度物理 · 物理学 2010-01-13 A. C. Seridonio , M. Yoshida , L. N. Oliveira

We show that the conductance of a quantum wire side-coupled to a quantum dot, with a gate potential favoring the formation of a dot magnetic moment, is a universal function of the temperature. Universality prevails even if the currents…

强关联电子 · 物理学 2009-07-19 A. C. Seridonio , M. Yoshida , L. N. Oliveira

We revisited the scaling behavior of the transport properties of a quantum dot system described by the spin-1/2 Anderson model using analytical methods. In the low temperature limit we show that the conductance has a universal behavior with…

介观与纳米尺度物理 · 物理学 2009-02-27 M. Crisan , I. Grosu , I. Tifrea

A numerical renormalization-group survey of the zero-bias electrical conductance through a quantum dot embedded in the conduction path of a nanodevice is reported. The results are examined in the light of a recently derived linear mapping…

介观与纳米尺度物理 · 物理学 2010-01-13 Makoto Yoshida , Antonio C. Seridonio , Luiz N. Oliveira

The thermoelectric properties of strongly correlated quantum dots, described by a single level Anderson model coupled to conduction electron leads, is investigated using Wilson's numerical renormalization group method. We calculate the…

强关联电子 · 物理学 2010-07-09 T. A. Costi , V. Zlatic

Quantum dots are useful model systems for studying quantum thermoelectric behavior because of their highly energy-dependent electron transport properties, which are tunable by electrostatic gating. As a result of this strong energy…

介观与纳米尺度物理 · 物理学 2016-06-17 Artis Svilans , Adam M. Burke , Sofia Fahlvik Svensson , Martin Leijnse , Heiner Linke

We calculate the conductance through a quantum dot weakly coupled to metallic leads, modeled by the spin-1/2 Anderson model with finite Coulomb repulsion $U$. We adopt the non-crossing approximation method in its finite-$U$ extension…

强关联电子 · 物理学 2009-11-07 D. Gerace , E. Pavarini , L. C. Andreani

We study the electric and thermoelectric transport properties of correlated quantum dots coupled to two ferromagnetic leads and one superconducting electrode. Transport through such hybrid devices depends on the interplay of…

介观与纳米尺度物理 · 物理学 2015-06-19 Krzysztof P. Wojcik , Ireneusz Weymann

I discuss thermoelectric properties of a quantum dot coupled to one normal and one superconducting lead in the presence of Kondo effect and Andreev scattering. I will focus on conductance, thermal conductance, thermopower and related…

介观与纳米尺度物理 · 物理学 2008-10-07 Mariusz Krawiec

The transport across a Kondo-correlated quantum dot coupled to two leads with independent temperatures and chemical potentials is studied using a controlled non-perturbative, and in this sense exact numeric treatment based on a hybrid…

介观与纳米尺度物理 · 物理学 2024-09-26 Anand Manaparambil , Andreas Weichselbaum , Jan von Delft , Ireneusz Weymann

The Fano-Kondo effect in zero-bias conductance is investigated based on a theoretical model for the T-shaped quantum dot. The conductance as a function of the gate voltage is generally characterized by a Fano asymmetric parameter q. With…

介观与纳米尺度物理 · 物理学 2009-11-10 Isao Maruyama , Naokazu Shibata , Kazuo Ueda

The thermal dependence of the electrical conductance of the single-electron transistor (SET) in the zero-bias Kondo regime is discussed. An exact mapping to the universal curve for the symmetric Anderson model is established. Linear, the…

介观与纳米尺度物理 · 物理学 2010-01-13 M. Yoshida , A. C. Seridonio , L. N. Oliveira

We study the thermopower and some related transport quantities due to the orbital Kondo effect in a single quantum dot system with a finite value of Coulomb repulsion by means of the noncrossing approximation applied to the multiorbital…

介观与纳米尺度物理 · 物理学 2007-05-23 Rui Sakano , Tomoko Kita , Norio Kawakami

Encouraged by the recent real-time renormalization group results we carried out a detailed analysis of the nonequilibrium Kondo conductance observed in an InAs nanowire-based quantum dot and found them to be in excellent agreement. We show…

介观与纳米尺度物理 · 物理学 2012-10-11 Andrey V. Kretinin , Hadas Shtrikman , Diana Mahalu

The time-dependent non-crossing approximation is employed for the single-electron transistor to calculate the transient response of the conductance for a variety of temperatures and biases. We consider the case when the dot-lead tunneling…

强关联电子 · 物理学 2007-05-23 Artur F. Izmaylov , Ali Ihsan Goker , Peter Nordlander , Barry Friedman

Thermoelectric transport phenomena in a single-level quantum dot coupled to ferromagnetic leads are considered theoretically in the Kondo regime. The dot is described by the Anderson model with Rashba type spin-orbit interaction. The…

介观与纳米尺度物理 · 物理学 2014-12-10 Łukasz Karwacki , Piotr Trocha , Józef Barnaś

We investigate theoretically the thermoelectric transport through a circuit implementation of the three-channel "charge" Kondo model quantum simulator [Z. Iftikhar et al., Science 360, 1315 (2018)]. The universal temperature scaling law of…

介观与纳米尺度物理 · 物理学 2020-07-09 T. K. T. Nguyen , M. N. Kiselev

We study the charge and heat transport through the correlated quantum dot with a finite value of the charging energy U \neq \infty . The Kondo resonance appearing at temperatures below T_K is responsible for several qualitative changes of…

强关联电子 · 物理学 2007-05-23 A. Donabidowicz , T. Domanski , K. I. Wysokinski

We theoretically and experimentally study the universal scaling property of the spin-1/2 Kondo state in the magnetic field dependence of bias-voltage linear conductance through a quantum dot at low temperatures. We discuss an efficient and…

The effects of finite temperature in transport through nanoscopic systems exhibiting uniaxial magnetic anisotropy D, such as molecular magnets, adatoms, or quantum dots side-coupled to a large spin are analyzed in the Kondo regime. The…

介观与纳米尺度物理 · 物理学 2015-06-05 Maciej Misiorny , Ireneusz Weymann , Józef Barnaś
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