Resistive transition in superconducting films
作者： B. I. Halperin , David R. Nelson
DOI: 10.1007/BF00116988
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摘要: The consequences of a vortex unbinding picture two-dimensional superconductivity are worked out. Although there is no true finite-temperature phase transition, dirty superconducting films should display anomalous behavior below the BCS transition temperature and above an effective Kosterlitz-Thouless temperature. In particular, both conductivity fluctuation diamagnetism behave like ξ + 2 in this regime, where ξ+ correlation length calculated by Kosterlitz, ξ+-ξ c exp (B/T − T c)1/2. We estimate ξc, B, temperature, determine nonlinear resistivity T c. A recent theory dynamics, together with time-dependent Ginzburg-Landau theory, lead to determination frequency-dependent conductivity.
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