Abstract
Collective transverse plasma modes in a stack of Bi2Sr2CaCu2O8+x intrinsic Josephson junctions (IJJs) can be examined by observing the resonating Josephson vortex motion in the stack. In this study, we observed distinct multiple branches in the Josephson vortex‐flow current‐voltage characteristics, which suggested a transformation of Josephson vortex configuration among different collective plasma modes. For a dc bias on one of the multiple branches, we also obtained an evidence for the microwave emission from the transverse Josephson vortex motion in a stacked IJJs. The emission was examined by observing the changes in the quasiparticle branches of another stack of IJJs placed in proximity to the stack under study.
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