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Optical study of the electronic phase transition of strongly correlated YbInCu_4 | | Sean R. Garner
; Jason N. Hancock
; Yvonne W. Rodriguez
; Zack Schlesinger
; Benno Bucher
; Zach Fisk
; John L. Sarrao
; | | Date: |
10 Jul 2000 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Affiliation: | UCSC), Benno Bucher (ITR), Zach Fisk (NHMFL/FSU), John L. Sarrao (LANL | | Abstract: | Infrared, visible and near-UV reflectivity measurements are used to obtain conductivity as a function of temperature and frequency in YbInCu_4, which exhibits an isostructural phase-transition into a mixed-valent phase below T_v=42 K. In addition to a gradual loss of spectral weight with decreasing temperature extending up to 1.5 eV, a sharp resonance appears at 0.25 eV in the mixed-valent phase. This feature can be described in terms of excitations into the Kondo (Abrikosov-Suhl) resonance, and, like the sudden reduction of resistivity, provides a direct reflection of the onset of coherence in this strongly correlated electron system. | | Source: | arXiv, cond-mat/0007165 | | Services: | Forum | Review | PDF | Favorites | |
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