Title: Transverse Shift in Andreev Reflection,
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.