Experimental evidence for vortex-glass superconductivity in Y-Ba-Cu-O

R. H. Koch; V. Foglietti; W. J. Gallagher; G. Koren; A. Gupta; M. P. A. Fisher

doi:10.1103/PhysRevLett.63.1511

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Experimental evidence for vortex-glass superconductivity in Y-Ba-Cu-O

R. H. Koch, V. Foglietti, W. J. Gallagher, G. Koren, A. Gupta, M. P. A. Fisher

DOI 10.1103/PhysRevLett.63.1511 · Physical Review Letters

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Abstract

We demonstrate experimentally the existence of a continuous phase transition between a normal and a true superconducting phase (with zero linear resistivity) in epitaxial films of Y-Ba-Cu-O in strong magnetic fields fields, H≫Hc1. The nonlinear I-V curves show scaling behavior near the transition and the relevant critical exponents are extracted. These exponents are consistent with values expected for freezing into a superconducting vortex-glass phase.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown