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Dynamic Scaling at the Zero-field 2D Superconducting Transition

S. M. Ammirata·Mark Friesen·Stephen W. Pierson·LeRoy A. Gorham·Jeffrey C. Hunnicutt·M. L. Trawick·C. D. Keener
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Abstract

Zero-field current-voltage (I-V) characteristics of a thin ("two-dimensional") $Bi_2Sr_2CaCu_2O_{8+δ}$ crystal are reported and analyzed in two ways. The "conventional" approach yields ambiguous results while a dynamical scaling analysis offers new insights into the Kosterlitz-Thouless-Berezinskii transition. The scaling theory predicts that the universal jump of the $I$-$V$ exponent $α$ should be between $z+1$ and 1. A value of $z \simeq 5.6$ is obtained for the dynamical critical exponent, and is corroborated by data from other 2D superconductors. A simple dynamical model is presented to account for the results.

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S. M. Ammirata, Mark Friesen, Stephen W. Pierson, LeRoy A. Gorham, Jeffrey C. Hunnicutt, M. L. Trawick, C. D. Keener. 1997-12-01. Dynamic Scaling at the Zero-field 2D Superconducting Transition. https://arxiv.org/abs/cond-mat/9711127

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