Spin-lattice relaxation in the mixed state of YBa2Cu3O7-delta and Doppler-shifted d-wave quasiparticles

Article

关键词: QUASI-PARTICLE TRANSPORT;    DENSITY-OF-STATES;    VORTEX STATE;    CUPRATE SUPERCONDUCTORS;    HEAT;    SPECTRUM;    YBA2CU3O6.95;    NMR;   

DOI  :  10.1103/PhysRevB.61.12342

来源: SCIE

【 摘 要 】

We present calculations of the rate of planar Cu spin lattice relaxation in the mixed state of YBa2Cu3O7-delta due to ii! vortex vibrations and (ii) electron spin-flip scattering. We emphasize that both mechanisms give position-dependent rates due to the presence of vortices, and hence the magnetization recovery is characterized by a distribution of rates. We conclude that relaxation by vortex vibrations is too slow to be a significant factor in this material. Using a semiclassical model of Doppler shifted d-wave quasiparticles with a linear dispersion around the nodes, our calculation of the relaxation rate from electron spin-flip scattering shows partial agreement with experiment.

【 授权许可】

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