Bose-Glass behaviour in Bi_{2}Sr_{2}Ca_{1-x}Y_{x}Cu_{2}O_{8} 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
TL;DR
This paper provides experimental evidence of variable-range vortex hopping in irradiated Bi-2212 crystals, demonstrating flux-creep resistivity consistent with theoretical predictions by Nelson and Vinokur.
Contribution
It presents the first experimental observation of variable-range vortex hopping in high-temperature superconductor crystals with columnar defects.
Findings
Flux-creep resistivity consistent with variable-range vortex hopping
Evidence supports theoretical predictions by Nelson and Vinokur
Irradiation induces vortex dynamics characteristic of variable-range hopping
Abstract
We report on vortex transport in Bi_{2}Sr_{2}Ca_{1-x}Y_{x}Cu_{2}O_{8} 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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