Spin susceptibility in the superconducting state of the ferromagnetic superconductor UCoGe

Article

关键词: COEXISTENCE;    URHGE;   

DOI  :  10.1103/PhysRevB.88.085127

来源: SCIE

【 摘 要 】

In order to determine the superconducting paring state in the ferromagnetic superconductor UCoGe, the Co-59 NMR Knight shift, which is directly related to the microscopic spin susceptibility, was measured in the superconducting state under magnetic fields perpendicular to the spontaneous magnetization axis K-59(a,b). K-59(a,b) shows to be almost constant, but does not decrease below a superconducting transition. These behaviors as well as the invariance of the internal field at the Co site in the superconducting state exclude the spin-singlet pairing, and can be interpreted with the equal-spin pairing state with a large exchange field along the c axis, which was studied by Mineev [Phys. Rev. B 81, 180504 (2010)].

【 授权许可】

Free