Vortex mediated microwave absorption in superclean layered superconductors

Abstract

In the superclean case the spectrum of vortex core excitations in the presence of disorder is not random but consists of two series of equally-spaced levels. The I-V characteristics of such superconductors displays many interesting phenomena. A series of resonances is predicted at frequencies commensurate with the spacing of the vortex excitations. These resonances reveal an even-odd anomaly. In the presence of one weak impurity the excitation levels can approach each other and almost cross. Absorption at very low frequencies is identified with the resonances arising in this case. The results of such microscopic theory coincide up to the order of magnitude with both the theory employing kinetic equation and the experiment. The non-linear effects associated with Zener transitions in such crossings are studied. These phenomena can be used as a probe of vortex core excitations.

11 pages, 2 Postscript figures

References in corpus (3)

• Flux-flow in d-wave superconductors: Low temperature universality and scaling
• Resistance of Layered Superclean Superconductors at Low Temperatures
• Cyclotron resonance in a two-dimensional electron gas with long-range randomness

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• The electronic state of vortices in YBa2Cu3Oy investigated by complex surface impedance measurement
• Electromagnetic Response of a Vortex in Layered Superconductors
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• Level statistics inside the vortex of a superconductor and symplectic random matrix theory in an external source
• Vortex Density of States and Absorption in Clean Layered Superconductors
• Charge Dynamics of Vortex Cores in Layered Chiral Triplet Superconductors
• Impurity Effects on Bound States in the Vortex Core of Topological S-wave Superconductor
• Dynamics vs electronic states of vortex core of high-T_c superconductors investigated by high-frequency impedance measurement
• Impurity Effects on Caroli-de Gennes-Matricon Mode in a Vortex Core in Superconductors
• Large spectral gap and impurity-induced states in a two-dimensional Abrikosov vortex