Temperature dependence of the Kondo resonance in YbAl[sub 3]

Journal Article · Mon Aug 30 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.1419· OSTI ID:6302302

Tjeng, L H; Oh, S; Cho, E; Lin, H; Chen, C T; Gweon, G; Park, J; Allen, J W; Suzuki, T; Makivic, M S; Cox, D L ^[1]

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1. AT T Bell Laboratories, 600 Mountain Avenue, Murray Hill, New Jersey 07974 (United States) Department of Physics, Seoul National University, Seoul, 151-742 (Korea, Republic of) Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States) Department of Physics, Tohoku University, Sendai 980 (Japan) Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States)

We report the observation of a strong temperature dependence of the Kondo resonance in the valence-band photoemission spectrum and of the 3[ital d][r arrow]4[ital f] white line in the x-ray absorption spectrum of YbAl[sub 3]. The asymmetric Kondo resonance has a binding energy of [similar to]35 meV with a [similar to]50 meV width. The temperature dependence of the Yb 4[ital f] spectral features and valence are well reproduced by Anderson impurity model calculations with a Kondo temperature of [ital T][sub [ital K]][approx]400 K, demonstrating that both spectroscopic and near ground state properties can be described within a unified theoretical framework.

• DOE Contract Number: AC02-76CH00016; FG02-90ER45416; FG02-87ER45326
• OSTI ID: 6302302
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:9; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
665100 -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
BINARY ALLOY SYSTEMS
BINDING ENERGY
ELECTRON SPECTROSCOPY
ENERGY
INTERMETALLIC COMPOUNDS
KONDO EFFECT
PHOTOELECTRON SPECTROSCOPY
RARE EARTH ALLOYS
RESONANCE
SPECTROSCOPY
TEMPERATURE DEPENDENCE
X-RAY SPECTROSCOPY
YTTERBIUM ALLOYS