Nonlinear I-V, High Flux-Flow Velocity Instability and Evidence for Quantum Fluctuations in BSCCO Superconducting Films

J. Chiaverini , J.N. Eckstein , I. Bozovic , S. Doniach , A. Kapitulnik

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classification ❄️ cond-mat.supr-con cond-mat.stat-mech

keywords bsccoevidencefluctuationsflux-flowhighlargequantumtemperature

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The large flux-flow velocity behavior of the high temperature superconductor BSCCO in the mixed state is studied by measurement of the current-voltage characteristic as a function of temperature and magnetic field direction. We find strong evidence for vortex-antivortex pairs that are excited by quantum fluctuations and contribute to the dissipation when dissociated by a large current.

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Nonlinear I-V, High Flux-Flow Velocity Instability and Evidence for Quantum Fluctuations in BSCCO Superconducting Films

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