Origin of infrared peaks in the optical conductivity of ytterbium compounds

Abstract

We have calculated optical conductivity [$\sigma (\omega )$] spectra of ytterbium compounds (YbAl${}_3$, YbAl${}_2$, YbCu${}_2$Si${}_2$, YbNi${}_2$Ge${}_2$, YbInCu${}_4$, YbRh${}_2$Si${}_2$, YbIr${}_2$Si${}_2$, and YbB${}_{12}$) based on the direct interband transition derived from first-principle band calculation and compared the results with the experimentally obtained $\sigma (\omega )$ spectra. The spectral feature of a peak in the middle-infrared region (mid-IR peak) and a shoulder structure in the far-infrared region (far-IR shoulder) in the experimental $\sigma (\omega )$ spectra can be described by the band calculation with a common renormalization factor. This result indicates that the infrared spectra of Yb compounds originate from the interband transition from the Yb $4f$ state but that the Yb $4f$ state shifts to the Fermi level with strong electron correlation.

arXiv comment4 pages, 2 figures. accepted for publication in Phys. Rev. B

References in corpus (14)

• Transfer of Spectral Weight in Spectroscopies of Correlated Electron Systems
• Universal scaling in the dynamical conductivity of heavy fermion Ce and Yb compounds
• Pseudogap Formation and Heavy Carrier Dynamics in Intermediate Valence YbAl3
• Dynamics and transport properties of Kondo insulators
• Indirect and direct energy gaps in the Kondo semiconductor YbB12
• Kondo Scaling in the Optical Response of YbIn_(1-x)Ag_xCu_4
• Observation of an optical non-Fermi-liquid behavior in the heavy fermion state of YbRh${}_2$Si${}_2$
• Dynamics and transport properties of heavy fermions: theory
• Optical study of the electronic phase transition of strongly correlated YbInCu_4
• Calculation of Optical Conductivity of YbB${}_{12}$ using Realistic Tight-Binding Model
• Origin of Middle-Infrared Peaks in Cerium Compounds
• Infrared study of valence transition compound YbInCu4 using cleaved surfaces
• The Kondo Dynamics of YbIn(1-x)AgxCu4
• Absence of Hybridization Gap in Heavy Electron Systems and Analysis of YbAl3 in terms of Nearly Free Electron Conduction Band

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• Strong electron correlations in FeSb2: An optical investigation and comparison with RuSb2
• Strongly hybridized electronic structure of YbAl2: An angle-resolved photoemission study
• Optical Evidence of Itinerant-Localized Crossover of $4f$ Electrons in Cerium Compounds
• Temperature- and Magnetic-Field-Dependent Optical Properties of Heavy Quasiparticles in YbIr2Si2
• From mixed valence to the Kondo lattice regime
• Contrasting pressure evolutions of $f$ electron hybridized states in CeRhIn${}_5$ and YbNi${}_3$Ga${}_9$: an optical conductivity study