A Possible Family of Ni-based High Temperature Superconductors

Congcong Le; Jinfeng Zeng; Guang-Han Cao; Jiangping Hu

paper

A Possible Family of Ni-based High Temperature Superconductors

arXiv:1712.05962

Abstract

We suggest that a family of Ni-based compounds, which contain [Ni $_{2}$ M $_{2}$ O] $^{2 -}$ (M=chalcogen) layers with an antiperovskite structure constructed by mixed-anion Ni complexes, NiM $_{4}$ O $_{2}$ , can be potential high temperature superconductors upon doping or applying pressure. The layer structures have been formed in many other transitional metal compounds such as La $_{2}$ B $_{2}$ Se $_{2}$ O $_{3}$ (B=Mn, Fe,Co). For the Ni-based compounds, we predict that the parental compounds host collinear antiferromagnetic states similar to those in the iron-based high temperature superconductors. The electronic physics near Fermi energy is controlled by two e $_{g}$ d-orbitals with completely independent in-plane kinematics. We predict that the superconductivity in this family is characterized by strong competition between extended s-wave and d-wave pairing symmetries.

5 pages, 4 figures

Cited by in corpus (1)

Structures and Physical Properties of CsV $_{2}$ Se $_{2 - x}$ O and V $_{2}$ Se $_{2}$ O