Doping-Dependent Nonlinear Meissner Effect and Spontaneous Currents in High-Tc Superconductors

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dc.creatorLee, Sheng-Chiang
dc.creatorSullivan, Mathew
dc.creatorRuchti, Gregory R.
dc.creatorAnlage, Steven M.
dc.creatorPalmer, Benjamin
dc.creatorMaiorov, B.
dc.creatorOsquiguil, E.
dc.date2004-05-26
dc.date2004-09-09
dc.date.accessioned2026-07-07T02:58:21Z
dc.date.available2026-07-07T02:58:21Z
dc.descriptionWe measure the local harmonic generation from superconducting thin films at microwave frequencies to investigate the intrinsic nonlinear Meissner effect near Tc in zero magnetic field. Both second and third harmonic generation are measured to identify time-reversal symmetry breaking (TRSB) and time-reversal symmetric (TRS) nonlinearities. We perform a systematic doping-dependent study of the nonlinear response and find that the TRS characteristic nonlinearity current density scale follows the doping dependence of the de-pairing critical current density. We also extract a spontaneous TRSB characteristic current density scale that onsets at Tc, grows with decreasing temperature, and systematically decreases in magnitude (at fixed T/Tc) with under-doping. The origin of this current scale could be Josephson circulating currents or the spontaneous magnetization associated with a TRSB order parameter.
dc.description7 pages, 5 figures, re-submitted to PRB in Sep 2004
dc.identifierhttps://arxiv.org/abs/cond-mat/0405595
dc.identifierhttp://arxiv.org/abs/cond-mat/0405595
dc.identifierPhys. Rev. B 71, 014507 (2005).
dc.identifierdoi:10.1103/PhysRevB.71.014507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24050
dc.subjectSuperconductivity
dc.titleDoping-Dependent Nonlinear Meissner Effect and Spontaneous Currents in High-Tc Superconductors
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