Hot-spot formation in stacks of intrinsic Josephson junctions in Bi 2Sr 2CaCu 2O 8

B. Gross*, S. Guénon, J. Yuan, M. Y. Li, J. Li, A. Ishii, R. G. Mints, T. Hatano, P. H. Wu, D. Koelle, H. B. Wang, R. Kleiner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We have studied experimentally and numerically temperature profiles and the formation of hot spots in intrinsic Josephson junction stacks in Bi 2Sr 2CaCu 2O 8 (BSCCO). The superconducting stacks are biased in a state where all junctions are resistive. The formation of hot spots in this system is shown to arise mainly from the strongly negative temperature coefficient of the c-axis resistivity of BSCCO at low temperatures. This leads to situations where the maximum temperature in the hot spot can be below or above the superconducting transition temperature T c. The numerical simulations are in good agreement with the experimental observations.

Original languageEnglish
Article number094524
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number9
DOIs
StatePublished - 26 Sep 2012

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