Spin paramagnetism in d-wave superconductors

Article

关键词: UPPER CRITICAL-FIELD;    YBA2CU3O7-DELTA THIN-FILMS;    GINZBURG-LANDAU EQUATIONS;    HIGH MAGNETIC-FIELDS;    REVERSIBLE MAGNETIZATION;    VORTEX STRUCTURE;    II SUPERCONDUCTORS;    MEGAGAUSS FIELDS;    LOW-TEMPERATURE;    MODEL;   

DOI  :  10.1103/PhysRevB.62.138

来源: SCIE

【 摘 要 】

The Ginzburg-Landau equations are derived from the microscopic theory for clean layered superconductors with d(x2-y2) pairing symmetry, including the Pauli paramagnetism effect. The upper critical field H-c2 parallel to the c axis is calculated. A comparison with the experimental data for YBa2Cu3O7-delta suggests that, relative to the orbital effect, the Pauli paramagnetism contribution to H-c2 is significant. The reversible magnetization M in high magnetic fields is also calculated, showing strong temperature dependence of the slope dM/dH, as a consequence of the spin paramagnetism. A simple expression for the high-temperature spin susceptibility is derived, in good agreement with the Knight-shift measurements on YBa2Cu4O8.

【 授权许可】

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