Pairing state with a time-reversal symmetry breaking in FeAs-based superconductors

Lee, Wei-Sheng

关键词: COMPETITION;    ELECTRONS;    GINZBURG-LANDAU THEORY;    HOLES;    ORDER PARAMETERS;    PAIRING INTERACTIONS;    RESONANCE;    SPECTROSCOPY;    SUPERCONDUCTORS;    SYMMETRY BREAKING MATSCI;   

DOI  :  10.2172/979954
RP-ID  :  SLAC-PUB-13931
PID  :  OSTI ID: 979954
Others  :  TRN: US1003908

学科分类：物理（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

We investigate the competition between the extended s{+-} wave and dx2-y2 -wave pairing order parameters in the iron-based superconductors. Because of the frustrating pairing interactions among the electron and the hole fermi pockets, a time-reversal symmetry breaking s + id pairing state could be favored. We analyze this pairing state within the Ginzburg-Landau theory, and explore the experimental consequences. In such a state, spatial inhomogeneity induces supercurrent near a non-magnetic impurity and the corners of a square sample. The resonance mode between the s{+-} and dx2?y2 -wave order parameters can be detected through the B1g-Raman spectroscopy.