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We theoretically study the nonequilibrium thermoelectric transport properties of a strongly-correlated molecule (or quantum dot) embedded in a tunnel junction. Assuming that the coupling of the molecule to the contacts is asymmetric, we…

介观与纳米尺度物理 · 物理学 2023-02-22 Anand Manaparambil , Ireneusz Weymann

The spin-resolved thermoelectric transport properties of correlated nanoscale junctions, consisting of a quantum dot/molecule asymmetrically coupled to external ferromagnetic contacts, are studied theoretically in the far-from-equilibrium…

介观与纳米尺度物理 · 物理学 2023-07-21 Anand Manaparambil , Ireneusz Weymann

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

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

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

The Seebeck coefficient (S) of a serially coupled quantum dot (SCQD) junction system is theoretically studied via a two-level Anderson model. A change of sign in S with respect to temperature is found, which arises from the competition…

介观与纳米尺度物理 · 物理学 2015-05-27 David M. -T. Kuo , Yia-chung Chang

We study the thermal transport in magnetic tunnel junctions. Thermal gradients across the tunneling barrier appear around the Fowler-Nordheim tunneling regime, due to the current-induced heat caused by quantum interference. Both…

材料科学 · 物理学 2013-08-22 J. F. Feng , D. P. Liu , Q. L. Ma , H. X. Wei , X. F. Han

Using analytical arguments and the numerical renormalization group method we investigate the spin-thermopower of a quantum dot in a magnetic field. In the particle-hole symmetric situation the temperature difference applied across the dot…

介观与纳米尺度物理 · 物理学 2012-02-24 Tomaz Rejec , Rok Zitko , Jernej Mravlje , Anton Ramsak

A first-principles approach is presented for the thermoelectricity in molecular junctions formed by a single molecule contact. The study investigates the Seebeck coefficient considering the source-drain electrodes with distinct temperatures…

介观与纳米尺度物理 · 物理学 2009-05-07 Yu-Shen Liu , Yu-Chang Chen

The tunneling conductance is calculated as a function of the gate voltage in wide temperature range for the single quantum dot systems with Coulomb interaction. We assume that two orbitals are active for the tunneling process. We show that…

强关联电子 · 物理学 2009-10-31 Wataru Izumida , Osamu Sakai , Yukihiro Shimizu

Creating temperature gradients in magnetic nanostructures has resulted in a new research direction, i.e., the combination of magneto- and thermoelectric effects. Here, we demonstrate the observation of one important effect of this class:…

We investigate a system of three tunnel-coupled semiconductor quantum dots in a triangular geometry, one of which is connected to a metallic lead, in the regime where each dot is essentially singly occupied. Both ferro- and…

强关联电子 · 物理学 2015-12-22 Andrew K. Mitchell , Thomas F. Jarrold , David E. Logan

The equilibrium thermoelectric and spectral properties of a double quantum dot system are investigated, with the geometry continuously tuned from series to parallel via a parameter $ p $. Within the non-crossing approximation in the…

介观与纳米尺度物理 · 物理学 2025-12-19 Diego Perez Daroca , Pablo Roura-Bas

We investigate the thermoelectric properties of a quantum dot coupled to ferromagnetic and superconducting electrodes. The combination of spin polarized tunneling at the ferromagnetic-quantum dot interface and the application of an external…

介观与纳米尺度物理 · 物理学 2016-08-10 Sun-Yong Hwang , Rosa Lopez , David Sanchez

We propose a model describing Seebeck effect on a weak link between two quantum systems with fine-tunable ground states of Fermi and Non-Fermi liquid origin. The experimental realization of the model can be achieved by utilizing the quantum…

介观与纳米尺度物理 · 物理学 2018-02-06 T. K. T. Nguyen , M. N. Kiselev

We study the response of the thermopower of a quantum dot in the Kondo regime to sinusoidal displacement of the dot energy level via a gate voltage using time dependent non-crossing approximation and linear response Onsager relations.…

介观与纳米尺度物理 · 物理学 2015-06-12 Ali Goker , Elif Gedik

Local variations in the Seebeck coefficient in low-dimensional materials-based nanostructures and devices play a major role in their thermoelectric performance. Unfortunately, currently most thermoelectric measurements probe the aggregate…

介观与纳米尺度物理 · 物理学 2020-08-25 Achim Harzheim , Charalambos Evangeli , Oleg V. Kolosov , Pascal Gehring

The Seebeck coefficient plays a fundamental role in identifying the efficiency of a thermoelectric device. Its theoretical evaluation for atomistic models is routinely based on Density Functional Theory calculations combined with the…

介观与纳米尺度物理 · 物理学 2016-08-31 Kaike Yang , Enrico Perfetto , Stefan Kurth , Gianluca Stefanucci , Roberto D'Agosta

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

Several models of thermionic energy nanoconverters have been proposed to study the transport phenomena that take place in electronic devices. For example, in resonant tunneling junctions those phenomena are manifested through the…

介观与纳米尺度物理 · 物理学 2020-06-02 G. Valencia-Ortega , L. A. Arias-Hernandez
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