D+id chiral superconductivity in a triangular lattice from trigonal bipyramidal complexes

Chen Lu, Li Da Zhang, Xianxin Wu, Fan Yang, Jiangping Hu

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Abstract

We model the newly predicted high-Tc superconducting candidates constructed by corner-shared trigonal bipyramidal complexes with an effective three-orbital tight-binding Hamiltonian and investigate the pairing symmetry of their superconducting states driven by electron-electron interactions. Our combined weak- and strong-coupling-based calculations consistently identify the chiral d+id superconductivity as the leading pairing symmetry in a wide doping range with realistic interaction parameters. This pairing state has a nontrivial topological Chern number and can host gapless chiral edge modes, and the vortex cores under magnetic field can carry Majorana zero modes.

Original languageEnglish
Article number165110
JournalPhysical Review B
Volume97
Issue number16
DOIs
Publication statusPublished - 6 Apr 2018

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Lu, C., Zhang, L. D., Wu, X., Yang, F., & Hu, J. (2018). D+id chiral superconductivity in a triangular lattice from trigonal bipyramidal complexes. Physical Review B, 97(16), Article 165110. https://doi.org/10.1103/PhysRevB.97.165110