Thermally assisted quantum vortex tunneling in the Hall and dissipative regime

Details Thermally assisted quantum vortex tunneling in the Hall and dissipative regime Thermally assisted quantum vortex tunneling in the Hall and dissipative regime

2002-06-15

arxiv.org/abs/cond-mat/0206285v1

Physics

Condensed Matter

Superconductivity

18 pages, 9 figures, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.064515

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 the moderately clean samples, we have found that a minimum in the relaxation rate exists at zero temperature, which tends to disappear with increase in the temperature.

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