Macroscopic quantum tunneling in high-$T_c$ superconductors: the role of collective charge oscillations

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dc.creatorFistul, M. V.
dc.date2006-06-29
dc.date.accessioned2026-07-07T07:12:56Z
dc.date.available2026-07-07T07:12:56Z
dc.descriptionWe present a theoretical study of an escape rate for switching from the superconducting state to a resistive one in series arrays of strongly interacting Josephson junctions. At low temperatures such a switching is determined by macroscopic quantum tunneling (MQT) of a spatially extended Josephson phase. An increase of the crossover temperature from the thermal to quantum regimes, and a giant enhancement of MQT escape rate is obtained. Such an effect is explained by excitation of collective charge oscillations forming a {\it charge instanton}. Using a model of screened Coulomb interaction we found that our analysis is in a good accord with recently published experimental results on an enhancement of the MQT in single crystals of high-$T_c$ superconductors.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0606751
dc.identifierhttp://arxiv.org/abs/cond-mat/0606751
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112258
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleMacroscopic quantum tunneling in high-$T_c$ superconductors: the role of collective charge oscillations
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