Critical Current Peaks at 3BΦ in Superconductors with Columnar Defects: Recrystallizing the Interstitial Glass

M. E. Gallamore; G. E. D. McCormack; T. P. Devereaux

doi:10.1103/PhysRevLett.93.067002

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Critical Current Peaks at 3BΦ in Superconductors with Columnar Defects: Recrystallizing the Interstitial Glass

M. E. Gallamore, G. E. D. McCormack, T. P. Devereaux

DOI 10.1103/PhysRevLett.93.067002 · Physical Review Letters

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Abstract

The role of commensurability and the interplay of correlated disorder and interactions on vortex dynamics in the presence of columnar pins is studied via molecular dynamics simulations. Simulations of dynamics reveal substantial caging effects and a nonmonotonic dependence of the critical current with enhancements near integer values of the matching field Bϕ and 3Bϕ in agreement with experiments on the cuprates. We find qualitative differences in the phase diagram for small and large values of the matching field.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Tl2Ba2CuO6+δ 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