Probing XY phase transitions in a Josephson junction array with tunable frustration

  1. R. Cosmic,
  2. K. Kawabata,
  3. Y. Ashida,
  4. H. Ikegami,
  5. S. Furukawa,
  6. P. Patil,
  7. J. M. Taylor,
  8. and Y. Nakamura
The seminal theoretical works of Berezinskii, Kosterlitz, and Thouless presented a new paradigm for phase transitions in condensed matter that are driven by topological excitations.