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arXiv · 1712.05962

A Possible Family of Ni-based High Temperature Superconductors

Congcong Le·Jinfeng Zeng·Guang-Han Cao·Jiangping Hu
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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.

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Congcong Le, Jinfeng Zeng, Guang-Han Cao, Jiangping Hu. 2017-12-16. A Possible Family of Ni-based High Temperature Superconductors. https://arxiv.org/abs/1712.05962

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