SCIENCE SPIN-OFFS

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A possible new family of unconventional high temperature superconductors

Jiangping Hu, Congcong Le
(Submitted on 9 Nov 2016)

We suggest a new family of Co/Ni-based materials that may host unconventional high temperature superconductivity (high-T

c
). These materials carry layered square lattices with each layer being formed by vertex-shared transition metal tetrahedra cation-anion complexes. The electronic physics in these materials is determined by the two dimensional layer and is fully attributed to the three near degenerated
t
2g
d-orbitals close to a
d
7
filling configuration in the d-shell of Co/Ni atoms . The electronic structure meets the necessary criteria for unconventional high T

c
materials proposed recently by us to unify the two known high-T

c
families, cuprates and iron-based superconductors. We predict that they host superconducting states with a d-wave pairing symmetry with T

c
potentially higher than those of iron-based superconductors. These materials, if realized, can be a fertile new ground to study strongly correlated electronic physics and provide decisive evidence for superconducting pairing mechanism.

https://arxiv.org/abs/1611.02835