Far-infrared reflectivity of Bi_2Sr_2CuO_6: the "anomalous Drude" model and optical pseudogap revisited

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dc.creatorLupi, S.
dc.creatorCalvani, P.
dc.creatorCapizzi, M.
dc.creatorRoy, P.
dc.date2000-01-18
dc.date2000-09-04
dc.date.accessioned2026-07-07T02:36:35Z
dc.date.available2026-07-07T02:36:35Z
dc.descriptionAn optical "pseudogap" is usually assumed to open at low T in the "anomalous Drude" absorption, which models the optical conductivity sigma(omega) (proportional to omega-1) of HCTS by a linewidth Gamma (on the order of 1000 cm-1) varying with omega. In the sigma(omega) of BSCO, measured down to 10 cm-1, we have resolved instead: i) a normal Drude term with Gamma=35 cm-1 at 30 K, in very good agreement with transport data; ii) a strong band peaked in the far infrared (FIR), likely due to bound charges, whose tail exhibits the omega-1 dependence. As the FIR peak softens for decreasing T, it opens a pseudogap-like depression in sigma(omega) accordingly to ordinary sum rules.
dc.description4 pages with 3 figs. Revised version. To appear on Phys. Rev. B, 1 Nov. 2000. Contact: paolo.calvani@roma1.infn.it
dc.identifierhttps://arxiv.org/abs/cond-mat/0001244
dc.identifierhttp://arxiv.org/abs/cond-mat/0001244
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/15970
dc.subjectSuperconductivity
dc.titleFar-infrared reflectivity of Bi_2Sr_2CuO_6: the "anomalous Drude" model and optical pseudogap revisited
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