Thermally assisted quantum vortex tunneling in the Hall and dissipative regime

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTORS;    HIGH-TC SUPERCONDUCTORS;    MAGNETIC-RELAXATION;    INERTIAL MASS;    MOVING SINGULARITY;    COLLECTIVE CREEP;    FLUX-MOTION;    CU-O;    VORTICES;    SUPERFLUID;   

DOI  :  10.1103/PhysRevB.66.064515

来源: SCIE

【 摘 要 】

Quantum vortex tunneling is studied for the case where the Hall and the dissipative dynamics are simultaneously present. For a given temperature, the magnetization relaxation rate is calculated as a function of the external current and the quasiparticle scattering time. The relaxation rate is solved analytically at zero temperature and obtained numerically at finite temperatures by the variational method. In moderately clean samples, we have found that a minimum in the relaxation rate exists at zero temperature, which tends to disappear with an increase in the temperature.

【 授权许可】

Free