Two-dimensional vortex fluctuations in the nonlinear current-voltage characteristics for high-temperature superconductors.
作者： Henrik Jeldtoft Jensen , Petter Minnhagen
DOI: 10.1103/PHYSREVLETT.66.1630
关键词: Condensed matter physics 、 Vortex 、 Interaction energy 、 High-temperature superconductivity 、 Superconductivity 、 Coupling (probability) 、 Inorganic compound 、 Magnetic field 、 Physics 、 Electrical resistivity and conductivity
摘要: The nonlinear current-voltage ({ital I}-{ital V}) characteristics are discussed in terms of thermally activated vortex-antivortex pairs the CuO{sub 2} planes. interaction energy two vortices a pair grows linearly with their separation due to interplane coupling. This linear gives rise critical current which decreases temperature. {ital V} characteristic has form V}{similar to}{ital I}({ital I}{minus}{ital I}{sub c}}){sup {alpha}({ital T}){minus}1}. Comparisons experiments on Y-Ba-Cu-O discussed. We suggest that data case magnetic field may be associated thermal vortex-unbinding transition.
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