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
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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