arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0905.0611cond-mat.mes-hall
收藏

通过Rashba自旋轨道耦合带绝缘体的输运:金属-绝缘体转变和自旋过滤效应

Transport through a band insulator with Rashba spin-orbit coupling: metal-insulator transition and spin-filtering effects

Thibaut Jonckheere, George Japaridze, Thierry Martin, Roland Hayn

摘要:

本文计算了一维带绝缘体在磁场和Rashba自旋轨道耦合作用下的电流-电压特性。没有自旋轨道耦合,我们发现一个完整的自旋过滤效应,这意味着电输运发生在一个自旋通道。对于一个大的磁场关闭的带隙,我们表明,自旋轨道耦合导致从金属到绝缘行为的转变。研究了电流中不同自旋分量随输运通道长度的振荡。

英文摘要:

We calculate the current-voltage characteristic of a one-dimensional band insulator with magnetic field and Rashba spin-orbit coupling which is connected to nonmagnetic leads. Without spin-orbit coupling we find a complete spin-filtering effect, meaning that the electric transport occurs in one spin channel only. For a large magnetic field which closes the band gap, we show that spin-orbit coupling leads to a transition from metallic to insulating behavior. The oscillations of the different spin-components of the current with the length of the transport channel are studied as well.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑