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arXiv 1807.06975cond-mat.mes-hall
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量子霍尔机制下石墨烯正常-超导结中的自旋输运

Spin transport in a graphene normal-superconductor junction in the quantum Hall regime

Tibor Sekera, Christoph Bruder, Rakesh P. Tiwari

摘要:

石墨烯的量子霍尔机制具有许多不寻常的特性。特别地,塞曼场的存在打开了零朗道能级内的能量区域,其中自旋向上和自旋向下的状态定位在单个边缘以相反的方向传播。我们表明,当这些边缘态耦合到一个s波超导体,载流子的运输是自旋过滤。这种自旋滤波效应可以追溯到塞曼场存在下镜面Andreev反射和Andreev逆反射的相互作用。

英文摘要:

The quantum Hall regime of graphene has many unusual properties. In particular, the presence of a Zeeman field opens up a region of energy within the zeroth Landau level, where the spin-up and spin-down states localized at a single edge propagate in opposite directions. We show that when these edge states are coupled to an s-wave superconductor, the transport of charge carriers is spin-filtered. This spin-filtering effect can be traced back to the interplay of specular Andreev reflections and Andreev retro-reflections in the presence of a Zeeman field.

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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