Crossed surface flat bands of Weyl semimetal superconductors

Physical Review Letters
Bo LuY Tanaka

Abstract

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. Our symmetry analysis is applicable to known candidate materials of time-reversal breaking Weyl semimetals. We also discuss their possible experimental verification by tunneling spectroscopy.

References

Apr 24, 1995·Physical Review Letters·Y Tanaka, S Kashiwaya
Aug 8, 2009·Physical Review Letters·Masatoshi SatoSatoshi Fujimoto
Sep 28, 2010·Physical Review Letters·Yukio TanakaMasatoshi Sato
Jan 15, 2011·Physical Review Letters·Yuval OregFelix von Oppen
Oct 27, 2011·Physical Review Letters·A A Burkov, Leon Balents
Nov 24, 2011·Physical Review Letters·Gang XuZhong Fang
Jun 12, 2012·Physical Review Letters·Hirosi Ooguri, Masaki Oshikawa
Sep 26, 2012·Physical Review Letters·Chen FangB Andrei Bernevig

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Citations

Apr 4, 2017·Reports on Progress in Physics·Masatoshi Sato, Yoichi Ando
Dec 14, 2016·Science Advances·Vladyslav KoziiLiang Fu
Nov 14, 2015·Physical Review Letters·Shingo Kobayashi, Masatoshi Sato
Feb 27, 2018·Physical Review Letters·Yi Li, F D M Haldane
May 23, 2015·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Andreas P Schnyder, Philip M R Brydon
Sep 17, 2019·Physical Review Letters·Shingo KobayashiMasatoshi Sato
Mar 22, 2019·Scientific Reports·N Lazarides, G P Tsironis
Jun 14, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Zhu-Xi Liu, An-Min Wang

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