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Power-Law Scaling Behaviors and Kosterlitz-Thouless Transition in the Resistive State of Ultra-Thin High-Tc Superconducting Films

Published online by Cambridge University Press:  26 February 2011

T. Onogi ,
R. Sugano  and
Y. Murayama
T. Onogi
Affiliation:
Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350–03, Japan
R. Sugano
Affiliation:
Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350–03, Japan
Y. Murayama
Affiliation:
Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350–03, Japan
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Abstract

By means of a Langevin dynamic simulation we studied the current-voltage characteristics of a two-dimensional (2D) Josephson-coupled lattice as a model high-Tc superconducting film. The result illustrates qualitative features of non-Ohmic power-law scaling behaviors observed in transport measurements, including striking effects of applied magnetic fields. We thereby suggest that the Kosterlitz-Thouless transition associated with 2D vortex-antivortex pairs may dominate over the resistive transition in weak magnetic fields H/Hc2 ≪C 1. Through a simple theoretical estimate, we also show that the KT model illustrates the thickness-dependence of resistive transition temperature and electric field effect in ultra-thin YBa2Cu3O7−x films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 473
Copyright
Copyright © Materials Research Society 1992

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References

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