Hot-spot formation in stacks of intrinsic Josephson junctions in Bi<mml:mrow/>2Sr<mml:mrow/>2CaCu<mml:mrow/>2O<mml:mrow/>8

2012/06/30 by B. Gross, Stefan Guénon, S. Guenon +16
Engineering · Physics and Astronomy · #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Physics of Superconductivity and Magnetism #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.86.094524

published as Phys. Rev. B 86, 094524 (2012)

openalex publication_date 2012/09/26 · arxiv created 2013/05/20 · arxiv updated 2013/05/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We have studied experimentally and numerically temperature profiles and the formation of hot spots in intrinsic Josephson junction stacks in Bi₂Sr₂CaCu₂O₈ (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.

Citations

• Interlayer Transport of Quasiparticles and Cooper Pairs inBi2Sr2CaCu2O8+δSuperconductors
• Temperature dependences of geometrical and velocity-matching resonances in Bi2Sr2CaCu2O8+xintrinsic Josephson junctions
• Visualizing supercurrents in ferromagnetic Josephson junctions with various arrangements of 0 andπsegments
• Hot Spots and Waves inBi2Sr2CaCu2O8Intrinsic Josephson Junction Stacks: A Study by Low Temperature Scanning Laser Microscopy
• Emission of Terahertz Waves From Stacks of Intrinsic Josephson Junctions
• Thermal Management in Large Bi2212 Mesas Used for Terahertz Sources