Decoupling Transition I. Flux Lattices in Pure Layered Superconductors
arXiv:cond-mat/0405015 · doi:10.1103/PhysRevB.72.024518
Abstract
We study the decoupling transition of flux lattices in a layered superconductors at which the Josephson coupling J is renormalized to zero. We identify the order parameter and related correlations; the latter are shown to decay as a power law in the decoupled phase. Within 2nd order renormalization group we find that the transition is always continuous, in contrast with results of the self consistent harmonic approximation. The critical temperature for weak J is ~1/B, where B is the magnetic field, while for strong J it is~1/sqrt{B} and is strongly enhanced. We show that renormaliztion group can be used to evaluate the Josephson plasma frequency and find that for weak J it is~1/BT^2 in the decoupled phase.
14 pages, 5 figures. New sections III, V. Companion to following article on "Decoupling and Depinning II: Flux lattices in disordered layered superconductors"
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Cited by in corpus (4)
- Deconfinement of Vortices with Continuously Variable Fractions of the Unit Flux Quanta in Two-Gap Superconductors
- Applicability of layered sine-Gordon models to layered superconductors: II. The case of magnetic coupling
- Decoupling and Depinning II: Flux lattices in disordered layered superconductors
- Phase Diagram of Vortices in High-T_c Superconductors with a Melting Line in the deep H_{c2} Region