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We analyze the subgap spectrum and transport properties of the quantum dot embedded between one superconducting and another metallic reservoirs and additionally coupled to an external boson mode. Emission/absorption of the bosonic quanta…

超导电性 · 物理学 2015-07-24 J. Baranski , T. Domanski

We investigate the current cross-correlations in a double quantum dot based Cooper pair splitter coupled to one superconducting and two ferromagnetic electrodes. The analysis is performed by assuming a weak coupling between the double dot…

介观与纳米尺度物理 · 物理学 2018-02-08 Kacper Wrześniewski , Piotr Trocha , Ireneusz Weymann

We study the transport properties of a hybrid nanostructure composed of a ferromagnet, two quantum dots, and a superconductor connected in series. By using the non-equilibrium Green's function approach, we have calculated the electric…

介观与纳米尺度物理 · 物理学 2015-05-14 E. C. Siqueira , G. G. Cabrera

We study resonant Andreev tunneling through a strongly interacting quantum dot connected to a normal and to a superconducting lead. We obtain a formula for the Andreev current and apply it to discuss the linear and non-linear transport in…

介观与纳米尺度物理 · 物理学 2009-10-30 Rosario Fazio , Roberto Raimondi

The Andreev transport properties of double quantum dot based Cooper pair splitters with one superconducting and two normal leads are studied theoretically in the Kondo regime. The influence of the superconducting pairing correlations on the…

介观与纳米尺度物理 · 物理学 2017-11-22 K. Wrzesniewski , I. Weymann

We investigate non-linear transport in a double quantum dot connected to two normal electrodes and a central superconducting finger. By this means, we perform a transport spectroscopy of such a system which implements a Cooper pair…

介观与纳米尺度物理 · 物理学 2012-05-10 L. G. Herrmann , P. Burset , W. J. Herrera , F. Portier , P. Roche , C. Strunk , A. Levy Yeyati , T. Kontos

In this work, it is considered a nanostructure composed by a quantum dot coupled to two ferromagnets and a superconductor. The transport properties of this system are studied within a generalized mean-field approximation taking into account…

介观与纳米尺度物理 · 物理学 2014-09-19 E. C. Siqueira , P. A. Orellana , A. C. Seridonio , R. C. Cestari , M. S. Figueira , G. G. Cabrera

Spin-polarized transport through a double quantum dot system attached to a common superconducting lead and two ferromagnetic electrodes (fork geometry) is investigated theoretically. The key objective of the analysis is to describe the…

介观与纳米尺度物理 · 物理学 2014-09-16 Piotr Trocha , Józef Barnaś

We study low-energy transport through a quantum dot coupled to one normal and two superconducting (SC) leads in a junction of Y-shape. In this geometry a crossover between Kondo dominated and Cooper-pairing dominated states occurs by tuning…

介观与纳米尺度物理 · 物理学 2015-06-11 Akira Oguri , Yoichi Tanaka , Johannes Bauer

We study transport through a double quantum dot system in which each quantum dot is coupled to a phonon mode. Such a system can be realized, e.g., using a suspended carbon nanotube. We find that the interplay between strong electron-phonon…

介观与纳米尺度物理 · 物理学 2013-11-26 Stefan Walter , Björn Trauzettel , Thomas L. Schmidt

We study transport through a Weyl semimetal quantum dot sandwiched between an $s$-wave superconductor and a normal lead. The conductance peaks at regular intervals and exhibits double periodicity with respect to two characteristic…

介观与纳米尺度物理 · 物理学 2019-08-14 Dibya Kanti Mukherjee , Sumathi Rao , Arijit Kundu

We present in this letter a theoretical analysis of the current-voltage (I-V) characteristics of a hybrid normal-superconducting device consisting of a quantum dot and two electrodes that can be either normal or superconducting. We show…

超导电性 · 物理学 2011-05-23 Argo Nurbawono , Yuan Ping Feng , Erhai Zhao , Chun Zhang

We consider tunneling in a hybrid system consisting of a superconductor with two or more probe electrodes which can be either normal metals or polarized ferromagnets. In particular we study transport at subgap voltages and temperatures.…

介观与纳米尺度物理 · 物理学 2009-10-31 G. Falci , D. Feinberg , F. W. J. Hekking

Electron transport experiments on two lateral quantum dots coupled in series are reviewed. An introduction to the charge stability diagram is given in terms of the electrochemical potentials of both dots. Resonant tunneling experiments show…

介观与纳米尺度物理 · 物理学 2009-11-07 W. G. van der Wiel , S. De Franceschi , J. M. Elzerman , T. Fujisawa , S. Tarucha , L. P. Kouwenhoven

We investigate transport and thermoelectric properties of hybrid systems based on a single-level quantum dot and one superconducting lead. The other lead is generally normal-metallic ferromagnet. In the latter case single-particle transport…

介观与纳米尺度物理 · 物理学 2017-05-03 Piotr Trocha , Józef Barnaś

A normal metal source reservoir can load two electrons onto a double quantum dot in the spin-triplet configuration. We show that if the drain lead of the dot is a spin-singlet superconductor, these electrons cannot form a Cooper pair and…

超导电性 · 物理学 2021-10-27 David Pekker , Po Zhang , Sergey M. Frolov

Using the modified perturbation theory, we theoretically study the nonequilibrium Andreev transport through a quantum dot coupled to normal and superconducting leads (N-QD-S), which is strongly influenced by the Kondo and superconducting…

介观与纳米尺度物理 · 物理学 2015-03-18 Yasuhiro Yamada , Yoichi Tanaka , Norio Kawakami

We derive a formula for the current through an interacting quantum dot coupled to two supercouducting leads, using the non-equilibrium Green's function formalism. It is shown that the formula takes an especially simple form, when the…

介观与纳米尺度物理 · 物理学 2009-10-31 Kicheon Kang

We examine the influence of the superconducting proximity effect on the transport properties of a T-shaped double quantum dot strongly coupled to two normal, nonmagnetic or ferromagnetic leads. We show that the two-stage Kondo screening may…

介观与纳米尺度物理 · 物理学 2018-07-02 Krzysztof P. Wójcik , Ireneusz Weymann

We study a strongly interacting quantum dot connected to a normal and to a superconducting lead. By means of the slave-boson technique we investigate the low temperature regime and discuss electrical transport through the dot. We find that…

介观与纳米尺度物理 · 物理学 2009-10-31 P. Schwab , R. Raimondi