摘要
We suggest a new family of Co[Ni-based materials that may host unconventional high temperature superconductivity （high-To）. 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 t2g d-orbitals close to a d7 filling configuration in the d-shell of CoJNi atoms. The electronic structure meets the necessary criteria for unconventional high Tc materials proposed recently by us to unify the two known high-Tc families, cuprates and iron-based superconductors. We predict that they host superconducting states with a d-wave pairing symmetry with Tc 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.
We suggest a new family of Co/Ni-based materials that may host unconventional high temperature superconductivity(high-Tc). 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 t2gd-orbitals close to a d7 filling configuration in the d-shell of Co/Ni atoms. The electronic structure meets the necessary criteria for unconventional high Tcmaterials proposed recently by us to unify the two known high-Tcfamilies, cuprates and iron-based superconductors. We predict that they host superconducting states with a d-wave pairing symmetry with Tcpotentially 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.
基金
supported by the National Basic Research Program of China (973 Program) (2015CB921300)
the National Natural Science Foundation of China (11334012)
the Strategic Priority Research Program of Chinese Academy of Sciences (XDB07000000)
