Interaction-mediated surface-state instability in disordered three-dimensional topological superconductors with spin SU(2) symmetry

Matthew S. Foster, Emil Yuzbashyan

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

We show that arbitrarily weak interparticle interactions destabilize the surface states of 3D topological superconductors with spin SU(2) invariance (symmetry class CI) in the presence of nonmagnetic disorder. The conduit for the instability is disorder-induced wave function multifractality. We argue that time-reversal symmetry breaks spontaneously at the surface, so that topologically protected states do not exist for this class. The interaction-stabilized surface phase is expected to exhibit ferromagnetic order, or to reside in an insulating plateau of the spin quantum Hall effect.

Original languageEnglish (US)
Article number246801
JournalPhysical review letters
Volume109
Issue number24
DOIs
StatePublished - Dec 10 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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