摘要
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. side where the magnetism and superconductivity coexist. The orbital even, and coexisting sxy ＋dx^2-y^2 wave （even parity）. There might be a small region in the electron-doping superconducting pairing is found to be spin singlet,
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. side where the magnetism and superconductivity coexist. The orbital even, and coexisting sxy ＋dx^2-y^2 wave （even parity）. There might be a small region in the electron-doping superconducting pairing is found to be spin singlet,
基金
Project supported by the Earmarked Grant for Research from the Research Grants Council of HKSAR,China (Grant Nos CUHK402205 and HKU3/05C)
