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arXiv 1302.6775cond-mat.mes-hallcond-mat.supr-con
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量子干涉混合自旋电流注入器

Quantum interference hybrid spin-current injector

F. Giazotto, F. S. Bergeret

摘要:

我们提出了一种量子干涉自旋注入器纳米器件,它由超导体-正常金属混合环通过隧道结连接到超导体-铁磁体双层组成。我们表明,对于一定的值的施加的电压偏置通过隧道势垒和磁通量通过环的自旋电流可以完全极化。此外,通过调节磁通量,可以切换自旋极化的符号。该操作可以在几十GHz范围内的频率下执行。我们探讨了纳米器件在很宽的参数范围内,建立其实验实现的最佳条件,并讨论其可能的应用。

英文摘要:

We propose a quantum interference spin-injector nanodevice consisting of a superconductor-normal metal hybrid loop connected to a superconductor-ferromagnet bilayer via a tunneling junction. We show that for certain values of the applied voltage bias across the tunnel barrier and the magnetic flux through the loop the spin-current can be fully polarized. Moreover, by tuning the magnetic flux one can switch the sign of the spin polarization. This operation can be performed at frequencies within the tens of GHz range. We explore the nanodevice in a wide range of parameters, establish the optimum conditions for its experimental realization and discuss its possible applications.

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。

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