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arXiv · 1803.05751

Non-centrosymmetric superconductors on honeycomb lattice

Der-Hau Lee·Chung-Hou Chung
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Abstract

We study non-centrosymmetric topological superconductivity in correlated doped quantum spin-Hall insulators (QSHI) on honeycomb lattice without inversion symmetry where the intrinsic (Kane-Mele) and Rashba spin-orbit couplings can in general exist. We explore the generic topologically non-trivial superconducting phase diagram of the model system. Over a certain parameter space, the parity-mixing superconducting state with co-existing spin-singlet $d$+$id$ and spin-triplet $p$+$ip$-wave pairing is found. On a zigzag nanoribbon, the parity-mixing superconducting state shows co-existing helical and chiral Majorana fermions at edges. Relevance of our results for experiments is discussed.

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Der-Hau Lee, Chung-Hou Chung. 2018-03-15. Non-centrosymmetric superconductors on honeycomb lattice. https://doi.org/10.1002/pssb.201800114

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