Orbital Origin of Extremely Anisotropic Superconducting Gap in Nematic Phase of FeSe Superconductor
The iron-based superconductors are characterized by multiple-orbital physics where all the five Fe 3d orbitals get involved.The multiple-orbital nature gives rise to various novel phenomena like orbital-selective Miscellaneous Mott transition, nematicity, and orbital fluctuation that provide a new route for realizing superconductivity.The complexit