Abstract
We use the time-dependent Ginzburg–Landau to calculate ac fluctuation conductivity and resistivity in type-II superconductor in 3D model under magnetic field. Thermal fluctuations are assumed to be strong enough to melt the Abrikosov vortex lattice created by the magnetic field into a vibrating vortex liquid and marginalize the effects of the vortex pinning by inhomogeneities. The nonlinear interaction term in the time-dependent Ginzburg–Landau is treated within self-consistent Gaussian approximation. We obtain expressions the complex conductivity and resistivity summing all Landau levels which are applicable essentially to whole liquid phase and are compared to experimental data on high-Tc superconductor YBa2Cu3 O7−δ.
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