Carrier relaxation dynamics in intra-gap states: the case of the superconductor Y Ba_2 Cu_3O_7-delta and the charge-density-wave semiconductor K_0.3MoO_3

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dc.creatorKabanov, V. V.
dc.creatorDemsar, J.
dc.creatorMihailovic, D.
dc.date1999-10-01
dc.date.accessioned2026-07-07T10:19:15Z
dc.date.available2026-07-07T10:19:15Z
dc.descriptionThe unusual slow carrier relaxation dynamics - observed in femtosecond pump-probe experiments on high-temperature superconductors and recently also in a charge-density-wave system - is analyzed in terms of a model for relaxation of carriers in intra-gap states. The data on YBa_2Cu_3O_7-delta near optimum doping and K_0.3$MoO_3 are found to be described very well with the model using a BCS-like gap which closes at T_c. From the analysis of the data we conclude that a significant intra-gap density of localized states exists in these materials, which can be clearly distinguished from quasiparticle states by the time-resolved optical experiments because of the different time- and temperature-dependences of the photoinduced transmission or reflection. Localized charges are suggested to be the most likely origin of the intra-gap states, while the similarity of the response in the two materials appear to exclude spin and vortex excitations.
dc.description3 postscript figures are included, will be published in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/9910003
dc.identifierhttp://arxiv.org/abs/cond-mat/9910003
dc.identifierPhys. Rev. B 61, 1477 (2000)
dc.identifierdoi:10.1103/PhysRevB.61.1477
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/174440
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleCarrier relaxation dynamics in intra-gap states: the case of the superconductor Y Ba_2 Cu_3O_7-delta and the charge-density-wave semiconductor K_0.3MoO_3
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