Collective dynamics of macroscopic quantum tunnelling in layered high-Tc superconductors

Masahiko Machida, Tomio Koyama

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

In order to construct a theory for photon-assisted macroscopic quantum tunnelling (MQT) in intrinsic Josephson junctions, we revisit the model of capacitively coupled intrinsic Josephson junctions and clarify how the quantized energy levels in the N-junction stacked system distribute inside a valley of the Josephson sinusoidal potential. Furthermore, we reveal that the MQT escape rate from the single-plasmon states to the uniform voltage ones by microwave irradiation is proportional to the square of the junction number (N2) in multi-photon processes. This result is consistent with the recent finding in Bi-2212 intrinsic Josephson junctions by Jin et al 2006 Phys.Rev.Lett.96177003.

Original languageEnglish
Article numberS06
JournalSuperconductor Science and Technology
Volume20
Issue number2
DOIs
Publication statusPublished - 2007 Feb 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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