Quantum phase transitions in superconducting arrays under external magnetic fields

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dc.creatorKim, Beom Jun
dc.creatorJeon, Gun Sang
dc.creatorChoi, M. -S.
dc.creatorChoi, M. Y.
dc.date1998-10-19
dc.date.accessioned2026-07-07T03:11:46Z
dc.date.available2026-07-07T03:11:46Z
dc.descriptionWe study the zero-temperature phase transitions of two-dimensional superconducting arrays with both the self- and the junction capacitances in the presence of external magnetic fields. We consider two kinds of excitations from the Mott insulating phase: charge-dipole excitations and single-charge excitations, and apply the second-order perturbation theory to find their energies. The resulting phase boundaries are found to depend strongly on the magnetic frustration, which measures the commensurate-incommensurate effects. Comparison of the obtained values with those in recent experiment suggests the possibility that the superconductor-insulator transition observed in experiment may not be of the Berezinskii-Kosterlitz-Thouless type. The system is also transformed to a classical three-dimensional XY model with the magnetic field in the time-direction; this allows the analogy to bulk superconductors, revealing the nature of the phase transitions.
dc.description9 pages including 7 figures, to appear in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/9810221
dc.identifierhttp://arxiv.org/abs/cond-mat/9810221
dc.identifierPhys. Rev. B 58, 14 524 (1998)
dc.identifierdoi:10.1103/PhysRevB.58.14524
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/28699
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleQuantum phase transitions in superconducting arrays under external magnetic fields
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