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Author (up) Affolter, J.; Tesei, M.; Pastoriza, H.; Leemann, C.; Martinoli, P. doi  openurl
  Title Observation of Ising-like critical fluctuations in frustrated Josephson junction arrays with modulated coupling energies Type Journal Article
  Year 2002 Publication Physica C Abbreviated Journal  
  Volume 369 Issue Pages 313-316  
  Keywords  
  Abstract We report the results of ac sheet conductance measurements performed on fully frustrated square arrays of Josephson junctions whose coupling energy is periodically modulated in one of the principal lattice directions. Such systems are predicted to exhibit two distinct transitions: a low-temperature Ising-like transition triggered by the proliferation of domain walls and a high-temperature transition driven by the vortex unbinding mechanism of the Beresinskii-Kosterlitz-Thouless (BKT) theory. Both the superfluid and dissipative components of the conductance are found to exhibit features which unambiguously demonstrate the existence of a double transition whose properties are consistent with the Ising-BKT scenario.  
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  Call Number BT @ hernan @ affolter02 Serial 1  
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