Probing quasiparticle dynamics in Bi2Sr2CaCu2O(8+delta) with a driven Josephson vortex lattice

Abstract

We show that the flux-flow transport of the Josephson vortex lattice (JVL) in layered high-temperature superconductors provides a convenient probe for both components of quasiparticle conductivity, ${\sigma }_c$ and ${\sigma }_{ab}$. We found that the JVL flux-flow resistivity, ${\rho }_{ff}$, in a wide range of magnetic fields is mainly determined by the in-plane dissipation. In the dense lattice regime ($B>1$ T) ${\rho }_{ff}(B)$ dependence is well fitted by the theoretical formula for that limit. That allows us to independently extract from the experimental data the values of ${\sigma }_c$ and of the ratio ${\sigma }_{ab}/({\sigma }_c{\gamma }^4)$. The extracted temperature dependence ${\sigma }_{ab}(T)$ is consistent with microwave data. The shape of the current-voltage characteristics is also sensitive to the frequency dependence of ${\sigma }_{ab}$ and that allows us to estimate the quasiparticle relaxation time and relate it to the impurity bandwidth using data obtained for the same crystal.

11 pages, 8 figures, subm. Phys. Rev. B

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• Layered superconductors as negative-refractive-index metamaterials
• In-plane dissipation as a possible synchronization mechanism for terahertz radiation from intrinsic Josephson junctions of layered superconductors
• Magnetic oscillations of critical current in intrinsic Josephson-junction stacks
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• Spectroscopy of Magnetic Excitations in Magnetic Superconductors Using Vortex Motion
• Electrodynamics of Josephson vortex lattice in high-temperature superconductors
• Nonlinear focusing of Terahertz laser beam using layered superconductor
• Josephson vortex lattice melting in Bi-2212 probed by commensurate oscillations of Josephson flux-flow
• Coexisting multiple dynamic states generated by magnetic field in Bi-2212 stacked Josephson junctions
• In-plane field-induced vortex liquid correlations in underdoped Bi_2Sr_2CaCu_2O_8+δ