%0 Journal Article
%A Varona Angulo, Santiago
%A Ortiz Martín, Laura
%A Viyuela, O.
%A Martín-Delgado Alcántara, Miguel Ángel
%T Topological phases in nodeless tetragonal superconductors
%D 2018
%@ 0953-8984
%U https://hdl.handle.net/20.500.14352/12974
%X We compute the topological phase diagram of 2D tetragonal superconductors for the only possible nodeless pairing channels compatible with that crystal symmetry. Subject to a Zeeman field and spin-orbit coupling, we demonstrate that these superconductors show surprising topological features: non-trivial high Chern numbers, massive edge states, and zero-energy modes out of high symmetry points, even though the edge states remain topologically protected. Interestingly, one of these pairing symmetries, d + id, has been proposed to describe materials such as water-intercalated sodium cobaltates, bilayer silicene or highly doped monolayer graphene.
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