Hot-spot formation in stacks of intrinsic Josephson junctions in Bi2Sr2CaCu2O8

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 Tc. The numerical simulations are in good agreement with the experimental observations.

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Cited by in corpus (13)

• Powerful terahertz emission from Bi2Sr2CaCu2O8+delta mesa arrays
• Effect of vortex hotspots on the radio-frequency surface resistance of superconductors
• Local SiC photoluminescence evidence of non-mutualistic hot spot formation and sub-THz coherent emission from a rectangular Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ mesa
• Direct imaging of hot spots in Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} mesa terahertz sources
• Intense terahertz emission from intrinsic Josephson junctions by external heat control
• Thermal and electromagnetic properties of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ intrinsic Josephson junction stacks studied via one-dimensional coupled sine-Gordon equations
• 3D simulations of the electrothermal and THz emission properties of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_8$ intrinsic Josephson junction stacks
• Mutually synchronized macroscopic Josephson oscillations demonstrated by polarization analysis of superconducting terahertz emitters
• Control of Circularly Polarized THz Wave from Intrinsic Josephson Junctions by Local Heating
• Terahertz emission from mutually synchronized standalone Bi2Sr2CaCu2O8+x intrinsic-Josephson-junction stacks
• Instability of flux flow and production of vortex-antivortex pairs by current-driven Josephson vortices in layered superconductors
• On-chip sensing of hotspots in superconducting terahertz emitters
• Possibility to enhance teraherz emission from intrinsic Josephson junction by external local heating