arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0808.0950cond-mat.mes-hallcond-mat.str-el
收藏

三重量子点环中的可调谐纯自旋流

Tunable pure spin currents in a triple-quantum-dot ring

Weijiang Gong, Yisong Zheng, Tianquan Lv

摘要:

对三端三量子点环中的电子输运性质进行了理论研究。通过在单个量子点上引入局域Rashba自旋轨道相互作用,计算了单引线中的电荷流和自旋流。我们发现,在没有磁场的情况下,出现了纯自旋电流。自旋电流的极化方向可以通过改变偏置电压来反转。此外,通过调节磁场强度,电荷和自旋电流交替地达到它们各自的峰值。

英文摘要:

Electron transport properties in a triple-quantum-dot ring with three terminals are theoretically studied. By introducing local Rashba spin-orbit interaction on an individual quantum dot, we calculate the charge and spin currents in one lead. We find that a pure spin current appears in the absence of a magnetic field. The polarization direction of the spin current can be inverted by altering the bias voltage. In addition, by tuning the magnetic field strength, the charge and spin currents reach their respective peaks alternately.

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。

↑