Competitions of magnetism and superconductivity in FeAs-based materials
Competitions of magnetism and superconductivity in FeAs-based materials
Using the numerical unrestricted Hartree–Fock approach, we study the ground state of a two-orbital model describing newly discovered FeAs-based superconductors. We observe the competition of a (0, π) mode spin-density wave and the superconductivity as the doping concentration changes. There might be a small region in the electron-doping side where …