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Photoemission from YbInCu4: Testing the single impurity model
Authors
AJ Arko
Z Fisk
+4 more
KS Graham
JJ Joyce
PS Riseborough
JL Sarrao
Publication date
1 January 1999
Publisher
eScholarship, University of California
Abstract
The electronic properties of single crystal YbInCu4 and YbAgCu4 have been investigated by means of high resolution photoelectron spectroscopy. A first order, isostructural phase transition for YbInCu4 at 42 K leads to changes in the Kondo temperature, of more than an order of magnitude. This phase transition and accompanying Kondo temperature change provide the most direct test of the single impurity model to date. The photoemission results are incongruous with the single impurity model predictions for temperature dependence, binding energy and 4f occupancy, encouraging a re-evaluation of the single impurity model applicability. © 1999 Taylor & Francis Group, LLC
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Last time updated on 25/12/2021