Infrared study of valence transition compound YbInCu4 using cleaved surfaces

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dc.creatorOkamura, H.
dc.creatorMichizawa, T.
dc.creatorNanba, T.
dc.creatorEbihara, T.
dc.date2006-09-07
dc.date2006-12-06
dc.date.accessioned2026-07-07T07:39:35Z
dc.date.available2026-07-07T07:39:35Z
dc.descriptionOptical reflectivity R(w) of YbInCu4 single crystals has been measured across its first-order valence transition at T_v ~ 42 K, using both polished and cleaved surfaces. R(w) measured on cleaved surfaces Rc(w) was found much lower than that on polished surface Rp(w) over the entire infrared region. Upon cooling through T_v, Rc(w) showed a rapid change over a temperature range of less than 2 K, and showed only minor changes with further cooling. In contrast, Rp(w) showed much more gradual and continuous changes across T_v, similarly to previously reported data on polished surfaces. The present result on cleaved surfaces demonstrates that the microscopic electronic structures of YbInCu4 observed with infrared spectroscopy indeed undergo a sudden change upon the valence transition. The gradual temperature-evolution of Rp(w) is most likely due to the compositional and/or Yb-In site disorders caused by polishing.
dc.description4 pages, 4 figures, Fig.1(a) corrected
dc.identifierhttps://arxiv.org/abs/cond-mat/0609157
dc.identifierhttp://arxiv.org/abs/cond-mat/0609157
dc.identifierPhys. Rev. B 75, 041101(R) (2007)
dc.identifierdoi:10.1103/PhysRevB.75.041101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/121501
dc.subjectStrongly Correlated Electrons
dc.titleInfrared study of valence transition compound YbInCu4 using cleaved surfaces
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