摘要
We consider possible high temperature superconductivity(high-Tc)in transition metal compounds with a cubic zinc-blende lattice structure.When the electron filling configuration in the d-shell is close to d7,all three t2g orbitals are near half filling with strong nearest neighbor antiferromagnetic(AFM)superexchange interactions.We argue that upon doping,this electronic environment can be one of"genes"to host unconventional high Tcwith a time reversal symmetry broken d2x2-x2-y2±idx2-y2pairing symmetry.With gapless nodal points along the diagonal directions,this state is a direct three-dimensional analogue to the two-dimensional B1gd-wave state in cuprates.We suggest that such a case may be realized in electron doped CoN,such as CoN1-xOx and(H,Li)1-xCoN.
基金
supported by the International Young Scientist Fellowship of Institute of Physics, Chinese Academy Sciences (Grant No. 2017002)
the Strategic Priority Research Program of Chinese Academy Sciences (Grant No. XDB07000000)
the Postdoctoral International Program from China Postdoctoral Science Foundation (Grant No. Y8BK131T61)
supported by the High-performance Computing Platform of Peking University
supported by the National Basic Research Program of China (Grant Nos. 2015CB921300, and 2017YFA0303100)
the National Natural Science Foundation of China (Grant No. NSFC-11334012)
