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arXiv · 1706.03688

Transverse Shift in Andreev Reflection

Ying Liu·Zhi-Ming Yu·Shengyuan A. Yang
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Abstract

An incoming electron is reflected back as a hole at a normal-metal-superconductor interface, a process known as Andreev reflection. We predict that there exists a universal transverse shift in this process due to the effect of spin-orbit coupling in the normal metal. Particularly, using both the scattering approach and the argument of angular momentum conservation, we demonstrate that the shifts are pronounced for lightly-doped Weyl semimetals, and are opposite for incoming electrons with different chirality, generating a chirality-dependent Hall effect for the reflected holes. The predicted shift is not limited to Weyl systems, but exists for a general three-dimensional spin-orbit- coupled metal interfaced with a superconductor.

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Ying Liu, Zhi-Ming Yu, Shengyuan A. Yang. 2017-06-12. Transverse Shift in Andreev Reflection. https://doi.org/10.1103/physrevb.96.121101

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