Electron-electron interaction effects on heat generation in a quantum dot

被引：8

作者：

Zhou, Li-Ling ^{[1
]}

Li, Yong-Jun ^{[2
]}

机构：

[1] Jiujiang Univ, Dept Phys, Jiujiang 332005, Peoples R China

[2] Jiujiang Univ, Coll Elect & Informat Engn, Jiujiang 332005, Peoples R China

来源：

PHYSICS LETTERS A | 2012年 / 376卷 / 36期

关键词：

Quantum dot; Heat generation; Electron-electron interaction; Electron-phonon interaction; POWER DISSIPATION; TRANSPORT;

D O I：

10.1016/j.physleta.2012.06.019

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the electronic current-induced heat generation in a single level, (epsilon) over bar (d), quantum dot (QD) with weak electron-electron interaction (U) over bar, and find that this interaction shows a cooling effect. We identify the mechanism behind this phenomenon: (1) Phonons (i.e., heat) can be absorbed by electrons as they tunnel through the QD. (2) Current-carrying electrons transfer a portion of their energy to the other electrons in the QD due to electron-electron interaction, and the energy is taken away as the heated electrons leave. As a result of the Coulomb interaction, a negative differential heat generation arises, and a heating valley emerges where the maximal current value locates. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2506 / 2508

页数：3

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