Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2012-04-16
Physics
Condensed Matter
Disordered Systems and Neural Networks
5 pages, 1 figure
Scientific paper
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 non-magnetic disorder. The conduit for the instability is disorder-induced wavefunction 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.
Foster Matthew S.
Yuzbashyan Emil A.
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