Spontaneous spin current near the interface between unconventional superconductors and ferromagnets

Article

关键词: REVERSAL SYMMETRY-BREAKING;    D-WAVE SUPERCONDUCTORS;    HIGH-TEMPERATURE SUPERCONDUCTORS;    QUASI-PARTICLE TRANSPORT;    T-C SUPERCONDUCTORS;    TIME-REVERSAL;    ORDER PARAMETERS;    SURFACE;    STATES;    JUNCTIONS;   

DOI  :  10.1103/PhysRevB.70.214524

来源: SCIE

【 摘 要 】

We study theoretically the proximity effect between ferromagnets (F) and superconductors (S) with broken time-reversal symmetry (T). A chiral (p(x)+/-ip(y))-wave and a d(x)(2)-y(2)-wave superconductor, the latter of which can form T-breaking surface state-i.e., (d(x)(2)-y(2)+/-is) state-are considered for the S side. The spatial variations of the superconducting order parameters and the magnetization are determined by solving the Bogoliubov-de Gennes equation. In the case of a chiral (p(x)+/-ip(y))-wave superconductor, a spontaneous spin current flows along the interface, but not in the case of a d(x)(2)-y(2)-wave superconductor. For a F/S(p(x)+/-ip(y))/F trilayer system, total spin current can be finite while total charge current vanishes, if the magnetizations of two F layers are antiparallel.

【 授权许可】

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