1999/10/29 by S. R. Garner, Sean Garner, Garner, S. R. +12
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic Properties of Alloys #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/9910485
4 pages, 3 postscript figures
arxiv created 1999/10/29 · openalex publication_date 1999/10/29 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Infrared measurements are used to obtain conductivity as a function of temperature and frequency in YbInCu4, which exhibits an isostructural transition to a mixed-valent state at Tv ≃ 42 K. In addition to a gradual loss of spectral weight with decreasing temperature extending up to 1.5 eV, sharp resonances appear in the mixed-valent state at 0 and 0.25 eV . These features may be key to understanding both YbInCu4 and the nature of the mixed-valent Kondo state.