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28 April 2024

» arxiv » cond-mat/0107262

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Direct experimental verification of applicability of single-site model for angle integrated photoemission of small $T_{K}$ concentrated Ce compounds
H.-D. Kim ; J. W. Allen ; J.-H. Park ; A. Sekiyama ; A. Yamasaki ; K. Kadono ; S. Suga ; Y. Saitoh ; T. Muro ; E. J. Freeman ; N. A. Frederick ; M. B. Maple ;
Date:	12 Jul 2001
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
Abstract:	Bulk-sensitive high-resolution Ce 4f spectra have been obtained from 3d $ o$ 4f resonance photoemission measurements on La$_{1-x}$Ce$_x$Al$_2$ and La$_{1-x}$Ce$_x$Ru$_2$ for $x = 0.0, 0.04, 1.0$. The 4f spectra of low-Kondo-temperature ($T_{K}$) (La,Ce)Al$_2$ are essentially identical except for a slight increase of the Kondo peak with $x$, which is consistent with a known increase of $T_{K}$ with $x$. In contrast, the 4f spectra of high-$T_{K}$ (La,Ce)Ru$_2$ show a Kondo-like peak and also a 0.5 eV structure which increases strongly with $x$. The resonance photon-energy dependences of the two contributions are different and the origin of the 0.5 eV structure is still uncertain.
Source:	arXiv, cond-mat/0107262
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