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

Abstract

We model the newly predicted high-$T_c$ superconducting candidates constructed by corner-shared trigonal bipyramidal complexes with an effective three-orbital tight-banding 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 nontrivial topological Chern-number and can host gapless chiral edge modes, and the vortex cores under magnetic field can carry Majorana zero modes.

8 pages, 9 figures

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Cited by in corpus (6)

• Epitaxy of hexagonal ABO${}_3$ quantum materials
• Substrate-supported triplet superconductivity in Dirac semimetals
• Proximity-driven ferromagnetism and superconductivity in the triangular Rashba-Hubbard model
• Topological superconductivity in Ni-based transition-metal trichalcogenide superconductors
• Spiral magnetism and chiral superconductivity in Kondo-Hubbard triangular lattice model
• Hydrogen Doping Induced $p_x\pm i{p}_y$ Triplet Superconductivity in Quasi-One-Dimensional K${}_2$Cr${}_3$As${}_3$