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Topological Phase Transition in Superconductors with Mirror Symmetry

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arxiv 1902.04599 v2 pith:ZWWFYSM6 submitted 2019-02-12 cond-mat.supr-con

Topological Phase Transition in Superconductors with Mirror Symmetry

classification cond-mat.supr-con
keywords phasecooperpairscondensationmirrorsuperconductorssymmetrytopological
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We provide analytical and numerical evidence that the attractive two-dimensional Kitaev model on a lattice with mirror symmetry demonstrates unusual 'intrinsic' phase at half filling. This phase emerges in the phase diagram at the boundary separating two topological superconductors with opposite Chern numbers and exists due to condensation of non-zero momentum Cooper pairs. Unlike Fulde-Ferrell-Larkin-Ovchinnikov superconductivity, the Cooper pairs momenta are lying along two lines in the Brillouin zone meaning simultaneous condensation of a continuum of Cooper pairs.

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