Transition in the flux lattice of artificially layered superconductors

D. Neerinck; K. Temst; M. Baert; E. Osquiguil; C. Van Haesendonck; Y. Bruynseraede; A. Gilabert; Ivan K. Schuller

doi:10.1103/PhysRevLett.67.2577

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Transition in the flux lattice of artificially layered superconductors

D. Neerinck, K. Temst, M. Baert, E. Osquiguil, C. Van Haesendonck, Y. Bruynseraede, A. Gilabert, Ivan K. Schuller

DOI 10.1103/PhysRevLett.67.2577 · Physical Review Letters

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Abstract

We report a novel magnetic-field dependence of the critical-current density Jc in artificially grown Ge/Pb superlattices. In these layered structures Jc exhibits an unexpected minimum as a function of perpendicular applied field, unlike any ever observed in other superconductor systems. The systematic evolution of this minimum as a function of layer thicknesses, temperature and pinning strength is related to either flux-lattice decoupling or melting.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Pb0.85Bi0.15 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown