Abstract
We analyze the electronic properties of the recently discovered stoichiometric superconductor by combining an ab initio approach and a projection of the band structure to a low-energy tight-binding Hamiltonian, based on the maximally localized Wannier orbitals of the Fe states. We identify the key symmetries as well as differences and similarities in the electronic structure between and the parent systems and . In particular, we find to have a significantly more quasi-two-dimensional electronic structure than the latter systems. Finally, we study the superconducting instabilities in by employing the leading angular harmonics approximation and find two potential -symmetry representations of the superconducting gap to be the dominant instabilities in this system.
3 More- Received 27 June 2017
DOI:https://doi.org/10.1103/PhysRevB.96.094521
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