Quantum phases in intrinsic Josephson junctions: Quantum magnetism analogy

Masahiko Machida, Keita Kobayashi, Tomio Koyama

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We explore quantum phases in intrinsic Josephson junction (IJJ) stacks, whose in-plane area is so small that the capacitive coupling has a dominant role in the superconducting phase dynamics. In such cases, the effective Hamiltonian for the superconducting phase can be mapped onto that of one-dimensional ferromagnetically-interacting spin model, whose spin length S depends on the magnitude of the on-site Coulomb repulsion. The ferromagnetic model for IJJ's prefers synchronized quantum features in contrast to the antiferromagnetically- interacting model in the conventional Josephson junction arrays.

Original languageEnglish
Pages (from-to)44-46
Number of pages3
JournalPhysica C: Superconductivity and its applications
Publication statusPublished - 2013


  • Capacitive coupling
  • Intrinsic Josephson junctions
  • Quantum phase

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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