Thermal and electromagnetic properties of Bi2 Sr2 CaCu2O8 intrinsic Josephson junction stacks studied via one-dimensional coupled sine-Gordon equations

F. Rudau, M. Tsujimoto, B. Gross, T. E. Judd, R. Wieland, E. Goldobin, N. Kinev, J. Yuan, Y. Huang, M. Ji, X. J. Zhou, D. Y. An, A. Ishii, R. G. Mints, P. H. Wu, T. Hatano, H. B. Wang, V. P. Koshelets, D. Koelle, R. Kleiner

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Abstract

We used one-dimensional coupled sine-Gordon equations combined with heat diffusion equations to numerically investigate the thermal and electromagnetic properties of a 300 μm long intrinsic Josephson junction stack consisting of N=700 junctions. The junctions in the stack are combined with M segments where we assume that inside a segment all junctions behave identically. Most simulations are for M=20. For not too high bath temperatures there is the appearance of a hot spot at high-bias currents. In terms of electromagnetic properties, robust standing-wave patterns appear in the current density and electric field distributions. These patterns come together with vortex/antivortex lines across the stack that correspond to π-kink states, discussed before in the literature for a homogeneous temperature distribution in the stack. We also discuss scaling of the thermal and electromagnetic properties with M, on the basis of simulations with M between 10 and 350.

Original languageEnglish
Article number104513
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number10
DOIs
StatePublished - 16 Mar 2015

Funding

FundersFunder number
Deutsche ForschungsgemeinschaftKL930/12-1
Ministry of Education and Science of the Russian Federation14.607.21.0100
National Natural Science Foundation of China11234006
Japan Society for the Promotion of Science25289108
Japan Society for the Promotion of Science

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