Fluctuation Effects on a Strongly Pinned Vortex Lattice in a Thin Type-II Superconducting Wire.
نویسندگان
چکیده
We report on transport properties of the vortex lattice in fine, round NbTi wires fabricated by a novel wire-drawing process. The voltage onset in the isothermal I-V characteristic is sharp for thick wires sd $ 1 mmd at 4.2 K and 6 T, but is rounded for thinner wires. The thinnest wires also display an Ohmic resistivity at low current densities. This linear resistivity decreases exponentially with temperature near TcsHd and approaches a constant value at low temperatures. We explain our results as finite size effects of the thermal and quantum collective creep of vortex lines.
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ورودعنوان ژورنال:
- Physical review letters
دوره 74 5 شماره
صفحات -
تاریخ انتشار 1995