Magnetic flux assisted thermospin transport in a Rashba ring  

作　　者：梁峰 高本领 古宇 

机构地区：[1]Department of Physics, Huaiyin Institute of Technology [2]Department of Physic and Siyuan Laboratory, Jinan University

出　　处：《Journal of Semiconductors》2016年第10期21-24,共4页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (No.11404142)

摘　　要：The electron transport through a Rashba ring with a magnetic flux and driven by a temperature difference is investigated. It is found that the spin interference effect induced by the Rashba spin-orbit interaction and by the magnetic flux can break the balance between the spin-up and spin-down component currents in the thermally driven charge current and thus result in a spin current. The analytical derivation and numerical calculations reveal that the magnitude, sign, peaks and spin-polarization of the generated spin current can be readily modulated by the system parameters. In particular, with some choices of the parameters, the spin polarization of the generated spin current can reach 100%, that is, a fully spin-polarized thermospin current can be produced. These results may help the use of the spin-dependent Seebeck effect to generate and manipulate a spin current.The electron transport through a Rashba ring with a magnetic flux and driven by a temperature difference is investigated. It is found that the spin interference effect induced by the Rashba spin-orbit interaction and by the magnetic flux can break the balance between the spin-up and spin-down component currents in the thermally driven charge current and thus result in a spin current. The analytical derivation and numerical calculations reveal that the magnitude, sign, peaks and spin-polarization of the generated spin current can be readily modulated by the system parameters. In particular, with some choices of the parameters, the spin polarization of the generated spin current can reach 100%, that is, a fully spin-polarized thermospin current can be produced. These results may help the use of the spin-dependent Seebeck effect to generate and manipulate a spin current.

关 键 词：spin current Seebeck effect Rashba ring 

分 类 号：O469[理学—凝聚态物理]