Specular Andreev Reflection in Inversion-symmetric Weyl-semimetals
Superconductivity
2015-06-15 v2
Abstract
The electron-hole conversion at the normal-metal superconductor interface in inversion-symmetric Weyl semimetals is investigated with an effective two-band model. We find that the specular Andreev reflection of Weyl fermions has two unusual features. The Andreev conductance for s-wave BCS pairing states is anisotropic, depending on the angle between the line connecting a pair of Weyl points and the normal of the junction, due to opposite chirality carried by the paired electrons. For the Fulde-Ferrell-Larkin-Ovchinnikov pairing states, the Andreev reflection spectrum is isotropic and is independent of the finite momentum of the Cooper pairs.
Keywords
Cite
@article{arxiv.1304.6477,
title = {Specular Andreev Reflection in Inversion-symmetric Weyl-semimetals},
author = {Wei Chen and Liang Jiang and R. Shen and L. Sheng and B. G. Wang and D. Y. Xing},
journal= {arXiv preprint arXiv:1304.6477},
year = {2015}
}