It has been noted that certain surfaces of Weyl semimetals have bound states forming open Fermi arcs, which are never seen in typical metallic states. We show that the Fermi arcs enable them to support an even more exotic surface state with crossed flat bands in the superconducting state. We clarify the topological origin of the crossed flat bands and the relevant symmetry that stabilizes the cross point. We also discuss their possible experimental verification by tunneling spectroscopy.
@article{arxiv.1406.3804,
title = {Crossed surface flat bands of Weyl semimetal superconductors},
author = {Bo Lu and Keiji Yada and Masatoshi Sato and Yukio Tanaka},
journal= {arXiv preprint arXiv:1406.3804},
year = {2015}
}
Comments
5 pages for main text and 5 pages for supplementary materials