Collective resonance modes of Josephson vortices in sandwiched stack of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ intrinsic Josephson junctions

Abstract

We observed splitting of the low-bias vortex-flow branch in a dense-Josephson-vortex state into multiple sub-branches in current-voltage characteristics of intrinsic Josephson junctions (IJJs) of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ single crystals in the long-junction limit. Each sub-branch corresponds to a plasma mode in serially coupled Josephson junctions. Splitting into low-bias linear sub-branches with a spread in the slopes and the inter-sub-branch mode-switching character are in good quantitative agreement with the prediction of the weak but finite inter-junction capacitive-coupling model incorporated with the inductive coupling. This suggests the importance of the role of the capacitive coupling in accurately describing the vortex dynamics in serially stacked IJJs.

arXiv comment4 pages, 3 figures, 1 table

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Cited by in corpus (3)

• Josephson-vortex-flow terahertz emission in layered high-$T_c$ superconducting single crystals
• Vortex-flow electromagnetic emission in stacked intrinsic Josephson junctions
• Collective Josephson vortex dynamics in a finite number of intrinsic Josephson junctions