Thermospin effects in parallel coupled double quantum dots in the presence of the Rashba spin-orbit interaction and Zeeman splitting

The thermoelectric and the thermospin transport properties, including electrical conductivity, Seebeck coefficient, thermal conductivity, and thermoelectric figure of merit, of a parallel coupled double-quantum-dot Aharonov-Bohm interferometer are investigated by means of the Green function techniqu...

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Bibliographic Details
Published inChinese physics B Vol. 21; no. 3; pp. 371 - 378
Main Authors Xue, Hui-Jie, Lü, Tian-Quan, Zhang, Hong-Chen, Yin, Hai-Tao, Cui, Lian, He, Ze-Long
Format Journal Article
LanguageEnglish
Published 01.03.2012
Subjects
Figure of merit
Interferometers
Joining
Magnetic fields
Mathematical models
Qunatum dots
Rashba效应
Seebeck系数
Spin-orbit interactions
Splitting
Thermal conductivity
Thermoelectricity
周期性安德森模型
塞曼分裂
平行
热电优值
耦合双量子点
自旋轨道相互作用
Germany, Niedersachsen, Seebeck
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/21/3/037201

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Summary:The thermoelectric and the thermospin transport properties, including electrical conductivity, Seebeck coefficient, thermal conductivity, and thermoelectric figure of merit, of a parallel coupled double-quantum-dot Aharonov-Bohm interferometer are investigated by means of the Green function technique. The periodic Anderson model is used to describe the quantum dot system, the Rashba spin-orbit interaction and the Zeeman splitting under a magnetic field are considered. The theoretical results show the constructive contribution of the Rashba effect and the influence of the magnetic field on the thermospin effects. We also show theoretically that material with a high figure of merit can be obtained by tuning the Zeeman splitting energy only.
Bibliography:thermospin effect, spin Seebeck coefficient, Zeeman splitting, Rashba spin-orbit inter-action
Xue Hui-Jie , Lu Tian-Quan , Zhang Hong-Chen Yin Hai-Tao , Cui Lian , and He Ze-Long Department of physics, Center for Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China b） Heilongjiang Key Laboratory for Low Dimensional and Mesoscopic Physics, School of Physics and Electronic Engineering Harbin Normal University, Harbin 150025, China c） Space Materials and Environment Engineering Laboratory, Harbin Institute of Technology, Harbin 150001, China
11-5639/O4
The thermoelectric and the thermospin transport properties, including electrical conductivity, Seebeck coefficient, thermal conductivity, and thermoelectric figure of merit, of a parallel coupled double-quantum-dot Aharonov-Bohm interferometer are investigated by means of the Green function technique. The periodic Anderson model is used to describe the quantum dot system, the Rashba spin-orbit interaction and the Zeeman splitting under a magnetic field are considered. The theoretical results show the constructive contribution of the Rashba effect and the influence of the magnetic field on the thermospin effects. We also show theoretically that material with a high figure of merit can be obtained by tuning the Zeeman splitting energy only.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/3/037201