2008/03/25 by Xiao-Liang Qi, Taylor L. Hughes, Srinivas Raghu +1 · 2 citations
Physics and Astronomy · #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.102.187001
published as Phys. Rev. Lett. 102, 187001 (2009) · 5 pages, 3 figures
arxiv created 2008/03/25 · arxiv updated 2013/05/29
We construct time reversal invariant topological superconductors and superfluids in two and three dimensions which are analogous to the recently discovered quantum spin Hall and three-d Z2 topological insulators respectively. These states have a full pairing gap in the bulk, gapless counter-propagating Majorana states at the boundary, and a pair of Majorana zero modes associated with each vortex. We show that the time reversal symmetry naturally emerges as a supersymmetry, which changes the parity of the fermion number associated with each time-reversal invariant vortex. In the presence of external T-breaking fields, non-local topological correlation is established among these fields, which is an experimentally observable manifestation of the emergent supersymmetry.