1107.4274 (Jian-Hua Jiang et al.)

Non-Abelian states from topological semimetals and related systems under
superconducting proximity effects    [PDF]

Jian-Hua Jiang, Si Wu

Non-Abelian states are characterized by the existence of zero-mode Majorana
fermions bound in the quantized vortices, which in the bulk is characterized by
an {\em odd} Chern number. In this Letter, we find that in topological
semimetals with a single two-band-touching node {\em all} the gapped pairing
states are {\em non-Abelian} states, regardless of the pairing details. The
property is further generalized to situations where such two-band-touching are
gapped and/or deformed. The nonzero Berry phase on the Fermi surface plays an
important role in the topological properties of the pairing states.

View original: http://arxiv.org/abs/1107.4274