Spin thermoelectric properties based on a Rashba triple-quantum-dot ring

Based on a Rashba triple-quantum-dot ring, we theoretically investigate spin thermoelectric properties by using the nonequilibrium Green's function method. Our results show that thermoelectric properties are strongly influenced by the Rashba effect. The underlying reason is the antiresonance ef...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied physics 2018-08, Vol.124 (8)
Main Authors: Li, Haidong, Wang, Yuan, Liu, Shaohui, kang, Xiubao, Ding, Jun, Hao, Haoshan
Format: Article
Language:English
Subjects:
Applied physics
Figure of merit
Green's functions
Properties (attributes)
Quantum dots
Seebeck effect
Spin-orbit interactions
Thermoelectric generators
Thermoelectricity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Based on a Rashba triple-quantum-dot ring, we theoretically investigate spin thermoelectric properties by using the nonequilibrium Green's function method. Our results show that thermoelectric properties are strongly influenced by the Rashba effect. The underlying reason is the antiresonance effect from Rashba spin-orbit interaction. When the magnetic field and Rashba phase factor satisfy a certain relationship, the value of the spin- dependent Seebeck coefficient alternates between its maximum and zero, and then a pure spin-dependent thermoelectric generator can be obtained. Moreover, we also find that the on-site Coulomb interaction is helpful to obtain a large amplitude for the figure of merit and a high Seebeck coefficient.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5029348