Josephson Glass and Decoupling of Flux Lattices in Layered Superconductors

Baruch Horovitz; T. Ruth Goldin

doi:10.1103/PhysRevLett.80.1734

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Josephson Glass and Decoupling of Flux Lattices in Layered Superconductors

Baruch Horovitz, T. Ruth Goldin

DOI 10.1103/PhysRevLett.80.1734 · Physical Review Letters

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Abstract

Phase transitions of a flux lattice in layered superconductors with magnetic field perpendicular to the layers and in the presence of disorder are studied. We find that the Josephson coupling between layers leads to a strongly pinned Josephson glass (JG) phase at low temperatures and fields. The JG phase is bounded by a decoupling transition line and a depinning transition line. These lines cross and form a multicritical point where four phases meet. The phase diagram accounts for unusual data on Bi2Sr2CaCu2O8 such as the “second peak” transition and the recently observed depinning transitions.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nd1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	23	Pressure not reported	onset