Cutoff length in the logarithmic interaction between a vortex-antivortex pair in quench-condensed superconducting Bi films
M. M. Rosario, Yu. Zadorozhny, Y. Liu
DOI 10.1103/PhysRevB.61.7005 · Physical Review B
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Abstract
The current-voltage (I−V) characteristic of disordered superconducting Bi films prepared in situ in a 3He cryostat by quench deposition has been studied. At a fixed temperature, a crossover from linear (Ohmic) to nonlinear (power-law) behavior was observed as the bias current was increased. An analysis of the data based on the theory of dynamic scaling was attempted. A unique value for the critical exponent is shown to be difficult to determine from the scaling alone. On the other hand, the features seen in the I−V curves can be accounted for using a simple picture of current-induced unbinding of vortex-antivortex pairs that involves a crossover from a logarithmic to an 1/r interaction between the vortex-antivortex pair. The implications of such an interaction for the nature of the two-dimensional superconductor-insulator transition are discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.9 | Pressure not reported | midpoint |
| Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5.79 | Pressure not reported | midpoint |
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