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Bose-Glass behaviour in Bi2Sr2Ca1-xYxCu2O8 crystals with columnar defects: experimental evidence for variable-range hopping

J. C. Soret, L. Ammor, V. Ta Phuoc, R. De Sousa, A. Ruyter, A. Wahl, G. Villard

cond-matarXiv:cond-mat/9812338

Abstract

We report on vortex transport in Bi2Sr2Ca1-xYxCu2O8 crystals irradiated at different doses of heavy ions. We show evidence of a flux-creep resistivity typical of a variable-range vortex hopping mechanism as predicted by Nelson and Vinokur.

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