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We theoretically study how one can control and enhance nonlinear thermoelectricity by regulating quantum coherence in nanostructures such as a quantum dot system or a single-molecule junction. In nanostructures, the typical temperature…

介观与纳米尺度物理 · 物理学 2020-03-11 Nobuhiko Taniguchi

Periodically driven quantum dots can act as counterparts of cyclic thermal machines at the nanoscale. In the slow-driving regime of geometric pumping, such machines have been shown to operate in analogy to a Carnot cycle. For larger driving…

介观与纳米尺度物理 · 物理学 2023-09-07 Juliette Monsel , Jens Schulenborg , Janine Splettstoesser

We investigate a thermoelectric nano-engine whose properties are steered by Coulomb interaction. The device whose design decouples charge and energy currents is made up of two interacting quantum dots connected to three different…

介观与纳米尺度物理 · 物理学 2017-09-13 A. -M. Daré , P. Lombardo

Quantum dots are model systems for quantum thermoelectric behavior because of the ability to control and measure the effects of electron-energy filtering and quantum confinement on thermoelectric properties. Interestingly, nonlinear…

We investigate the nonequilibrium transport properties of a double quantum dot system connected in parallel to two leads, including intradot electron-electron interaction. In the absence of interactions the system supports a bound state in…

介观与纳米尺度物理 · 物理学 2016-07-04 Miguel A. Sierra , M. Saiz-Bretin , F. Dominguez-Adame , David Sanchez

We study the linear and nonlinear thermovoltage of a quantum dot with effective attractive electron-electron interaction and weak, energy-dependent tunnel-coupling to electronic contacts. Remarkably, we find that the thermovoltage shows…

介观与纳米尺度物理 · 物理学 2020-06-19 Jens Schulenborg , Maarten R. Wegewijs , Janine Splettstoesser

We theoretically investigate strategies for harnessing quantum interference to optimize the figure of merit $ZT$, power output, and thermodynamic efficiency in multi-quantum-dot Aharonov-Bohm (AB) thermoelectric heat engines. Using the…

介观与纳米尺度物理 · 物理学 2025-09-05 Sridhar , Salil Bedkihal , Malay Bandyopadhyay

In the present work, we investigate the thermoelectric properties of a T-shaped double quantum dot system coupled to two metallic leads incorporating the intra-dot Coulomb interaction. We explore the role of the interference effects and…

介观与纳米尺度物理 · 物理学 2018-04-03 G. Gómez-Silva , P. A. Orellana , E. V. Anda

We analyze the power output of a quantum dot machine coupled to two electronic reservoirs via thermoelectric contacts, and to two thermal reservoirs - one hot and one cold. This machine is a nanoscale analogue of a conventional thermocouple…

介观与纳米尺度物理 · 物理学 2016-11-11 Robert. S. Whitney , Rafael Sánchez , Federica Haupt , Janine Splettstoesser

We study linear response and nonequilibrium steady-state thermoelectric transport through a single-level quantum dot tunnel coupled to two reservoirs held at different temperatures as well as chemical potentials. A fermion occupying the dot…

强关联电子 · 物理学 2013-06-21 D. M. Kennes , D. Schuricht , V. Meden

Within linear response theory using Pauli master equation approach, we have investigated the thermoelectric properties of quantum dots (QDs) embedded in an Aharonov-Bohm (AB) ring weakly coupled to two metallic electrodes. This study…

介观与纳米尺度物理 · 物理学 2025-04-23 Parbati Senapati , Prakash Parida

We numerically investigate the thermoelectric properties of a triangle quantum dot connected to metallic electrodes using the non-equilibrium Green's function method in the Anderson model. Exploiting the equation of motion method in the…

介观与纳米尺度物理 · 物理学 2022-06-08 Ahmad Ahmadi Fouladi , Javad Vahedi

Thermoelectric effects in a double quantum dot system coupled to external magnetic/nonmagnetic leads are investigated theoretically. The basic thermoelectric transport characteristics, like thermopower, electronic contribution to heat…

介观与纳米尺度物理 · 物理学 2015-03-19 Piotr Trocha , Józef Barnaś

The energy efficiency and power of a three-terminal thermoelectric nanodevice are studied by considering elastic tunneling through a single quantum dot. Facilitated by the three-terminal geometry, the nanodevice is able to generate…

介观与纳米尺度物理 · 物理学 2017-08-22 Jincheng Lu , Rongqian Wang , Yefeng Liu , Jian-Hua Jiang

We study a three-terminal setup consisting of a single-level quantum dot capacitively coupled to a quantum point contact. The point contact connects to a source and drain reservoirs while the quantum dot is coupled to a single base…

介观与纳米尺度物理 · 物理学 2019-07-31 Jing Yang , Cyril Elouard , Janine Splettstoesser , Björn Sothmann , Rafael Sánchez , Andrew N. Jordan

A simplified analytical model of single-level quantum dot (QD) refrigerator was studied without considering the electron spin and Coulomb interaction. Based on the ballistic transport of electrons between two reservoirs across the QD, the…

介观与纳米尺度物理 · 物理学 2021-10-18 Xiaolong Liu , Xiaoguang Luo , Chengyun Hong , Zhen Bao , Yong Ding , Jianxi Yao , Songyuan Dai

We study the efficiency of a simple quantum dot heat engine at maximum power. In contrast to the quasi-statically operated Carnot engine whose efficiency reaches the theoretical maximum, recent research on more realistic engines operated in…

统计力学 · 物理学 2018-12-05 Sang Hoon Lee , Jaegon Um , Hyunggyu Park

We show that coherent electron transport through zero-dimensional systems can be used to tailor the shape of the system's transmission function. This quantum-engineering approach can be used to enhance the performance of quantum dots or…

介观与纳米尺度物理 · 物理学 2011-10-10 Olov Karlstrom , Heiner Linke , Gunnar Karlstrom , Andreas Wacker

In this article we review the thermoelectric properties of three terminal devices with Coulomb coupled quantum dots (QDs) as observed in recent experiments [1,2]. The system we consider consists of two Coulomb-blockade QDs one of which can…

介观与纳米尺度物理 · 物理学 2016-11-17 Holger Thierschmann , Rafael Sánchez , Björn Sothmann , Hartmut Buhmann , Laurens W. Molenkamp

Coherent charge and heat transport through periodically driven nanodevices provide a platform for studying thermoelectric effects on the nanoscale. Here we study a junction comprising a quantum dot connected to two fermionic terminals by…

介观与纳米尺度物理 · 物理学 2024-04-03 Debashree Chowdhury , O. Entin-Wohlman , A. Aharony