Periodic Anderson model from the atomic limit: The optical conductivity of FeSi

dc.creatorFoglio, ME
dc.creatorFigueira, MS
dc.date2000
dc.dateSEP 15
dc.date2014-12-02T16:25:09Z
dc.date2015-11-26T17:20:58Z
dc.date2014-12-02T16:25:09Z
dc.date2015-11-26T17:20:58Z
dc.date.accessioned2018-03-29T00:08:33Z
dc.date.available2018-03-29T00:08:33Z
dc.identifierPhysical Review B. American Physical Soc, v. 62, n. 12, n. 7882, n. 7891, 2000.
dc.identifier0163-1829
dc.identifierWOS:000089593400036
dc.identifier10.1103/PhysRevB.62.7882
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59305
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/59305
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/59305
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283262
dc.descriptionThe optical conductivity sigma(omega,T) can be obtained with the same approximations employed in a previous work to calculate the static conductivity a(T) and magnetic susceptibility chi(T) of FeSi, a compound that behaves like a Kondo insulator with both quantities vanishing rapidly for T --> 0; the periodic Anderson model (PAM) for U --> infinity was employed to model FeSi, assuming that the system is in the intermediate valence region. The same treatment is employed in the present paper to describe the three properties for the same compound, and a fairly good agreement with the experimental results is obtained. The sum rule of sigma(omega,T), appropriate for the PAM, is well satisfied in the range of the experimentally measured temperatures. Some quantities derived from our results are of the same order of magnitude that was estimated from recent measurements of angle-resolved low-temperature photoemission in FeSi.
dc.description62
dc.description12
dc.description7882
dc.description7891
dc.languageen
dc.publisherAmerican Physical Soc
dc.publisherCollege Pk
dc.publisherEUA
dc.relationPhysical Review B
dc.relationPhys. Rev. B
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectStrongly Correlated Insulator
dc.subjectLow-temperature Transport
dc.subjectInfinite Dimensions
dc.subjectKondo Insulators
dc.subjectThermodynamic Properties
dc.subjectElectronic-structure
dc.subjectCumulant Expansion
dc.subjectFermion Systems
dc.subjectHubbard-model
dc.subjectGap Formation
dc.titlePeriodic Anderson model from the atomic limit: The optical conductivity of FeSi
dc.typeArtículos de revistas


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