Quantum phase transitions in two dimensions: Experiments in Josephson-junction arrays | Zendy

Herre S. J. van der Zant | Zendy; W. J. Elion | Zendy; L.J. Geerligs | Zendy; J. E. Mooij | Zendy

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Quantum phase transitions in two dimensions: Experiments in Josephson-junction arrays

Author(s) -

Herre S. J. van der Zant,

W. J. Elion,

L.J. Geerligs,

J. E. Mooij

Publication year - 1996

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.54.10081

Subject(s) - josephson effect , condensed matter physics , physics , superconductivity , pi josephson junction , capacitive coupling , square (algebra) , cooper pair , coupling (piping) , phase (matter) , magnetic field , superconducting tunnel junction , quantum , energy (signal processing) , quantum mechanics , materials science , geometry , mathematics , voltage , metallurgy

We have studied two-dimensional superconducting networks coupled by Josephson junctions in the regime where the Josephson coupling energy is comparable in magnitude to the capacitive energy of charging an island with a Cooper pair. We have mapped out the dependence of quantum phase transitions on the ratio of these two energies ~for different values of the applied magnetic field! and on the applied field for arrays both with square and triangular cells. Our experimental results are compared with existing theoretical predictions. @S0163-1829~96!07737-5#

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