Decoupling transition of flux lattices in pure layered superconductors

Ruth Goldin; Baruch Horovitz

doi:10.1103/PhysRevB.72.024518

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Decoupling transition of flux lattices in pure layered superconductors

Ruth Goldin, Baruch Horovitz

DOI 10.1103/PhysRevB.72.024518 · Physical Review B

T1

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Abstract

We study the decoupling transition of flux lattices in 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 the second-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∕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∕BT2 in the decoupled phase.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown