RF responses and in-phase Josephson vortex motion in an intrinsic Josephson junction system with a periodic pinning potential

Yasuyuki Yamada, Koji Nakajima, Kensuke Nakajima

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We investigate experimentally the dynamics of Josephson vortices interacting with electromagnetic waves in Bi2Sr2CaCu 2O8+y intrinsic Josephson junction stacks by means of millimeter wave irradiation and numerical simulations based on coupled sine-Gordon equations. We have found that an introduction of pancake vortices by tilting the external magnetic field from CuO2 planes reveals Shapiro-step-like features on the flux-flow characteristics. Those steps are assumed to be a manifestation of an in-phase coherent motion of Josephson vortices caused by a periodic potential developed by pancake vortices. The results of the numerical simulation, taking into account the periodic potential, supports the validity of such an assumption.

Original languageEnglish
Pages (from-to)1053-1056
Number of pages4
JournalJournal of the Korean Physical Society
Volume48
Issue number5 I
Publication statusPublished - 2006 May 1

Keywords

  • Flux flow
  • Josephson junction
  • Simulation
  • Sine-Gordon equation
  • Vortex

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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