arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1409.6897cond-mat.mes-hall
收藏

二维费米子系统中自旋霍尔效应的研究

Understanding spin Hall effect in two-dimensional fermionic systems with generic spin-orbit interaction

Boudhayan Paul, Tarun Kanti Ghosh

摘要:

我们深入研究了一般自旋轨道耦合二维费米子系统中的自旋霍尔效应。我们解析地导出了引起自旋霍尔效应的自旋-轨道力,并发现它具有类似“洛伦兹力”的形式。我们还导出了产生这种力的赝磁场。我们建立了自旋霍尔电导率、磁通量子与这个赝磁场之间的关系,类似于电荷霍尔电导率、磁通量子与外场之间的关系。我们还提出了一个精确的封闭形式的自旋霍尔电导率在一个通用的自旋轨道耦合系统。根据自旋轨道相互作用的维数,自旋霍尔电导率取决于Rashba参数和费米子密度的不同组合。

英文摘要:

We delve into spin Hall effect in generic spin-orbit coupled two-dimensional fermionic systems. We derive analytically the spin-orbit force responsible for the spin Hall effect, and find that it has `Lorentz force'-like form. We also derive the pseudo magnetic field responsible for this force. We establish the relation between the spin Hall conductivity, flux quanta and this pseudo magnetic field, similar to the one between charge Hall conductivity, flux quanta and the external field. We also present an exact closed-form expression of the spin Hall conductivity in a generic spin-orbit coupled system. Depending on the dimensionality of the spin-orbit interactions, the spin Hall conductivity depends on different combinations of Rashba parameter and fermion density.

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。

↑