Vt. Phuoc et al., Bose-glass behavior in Bi2Sr2Ca1-xYxCu2O8 crystals with columnar defects: Experimental evidence for variable-range hopping, INT J MOD B, 12(29-31), 1998, pp. 3338-3341
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 Nelso
n and Vinokur.