System for fast time-resolved measurements of c-axis quasiparticle conductivity in intrinsic Josephson junctions of Bi₂Sr₂CaCu₂O₈₊δ

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A wide-band cryogenic amplifier measurement system for time-resolved four-point current-voltage (I-V)-characteristic measurements on Bi2Sr2CaCu2O8+delta mesa structures is described. We present measurements which demonstrate the importance of self-heating on similar to50 ns time scales. Such heating is likely to have been very significant in many previously published measurements, where the reported nonlinear I-V characteristics have been used to derive superconducting energy gaps. (C) 2002 American Institute of Physics.


Original languageEnglish
Pages (from-to)2535-2537
Number of pages3
JournalApplied Physics Letters
Issue number14
Publication statusPublished - 1 Jan 2002