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arXiv 2103.07345cond-mat.supr-con
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二维反铁磁体中的电控交叉Andreev反射

Electrically controlled crossed Andreev reflection in two-dimensional antiferromagnets

Martin F. Jakobsen, Arne Brataas, Alireza Qaiumzadeh

摘要:

我们报道了夹在两个反铁磁层之间的超导体中的可调谐交叉Andreev反射(CAR)。我们考虑最近的例子,二维磁铁与六边形晶格,栅极电压控制的载流子类型和密度,并预测一个强大的签名完美的CAR在非局部微分电导与一个电子掺杂和一个空穴掺杂的反铁磁铅。无磁场和自旋简并的CAR信号是电控的,并且在大电压范围内可见,显示出固态量子纠缠应用的前景。

英文摘要:

We report tunable crossed Andreev reflection (CAR) in a superconductor sandwiched between two antiferromagnetic layers. We consider recent examples of two-dimensional magnets with hexagonal lattices, where gate voltages control the carrier type and density, and predict a robust signature of perfect CAR in the nonlocal differential conductance with one electron-doped and one hole-doped antiferromagnetic lead. The magnetic field-free and spin-degenerate CAR signal is electrically controlled and visible over a large voltage range, showing promise for solid-state quantum entanglement 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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