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

doi:10.1016/S0921-4526(01)01202-9

paper

Direct experimental verification of applicability of single-site model for angle integrated photoemission of small $T_{K}$ concentrated Ce compounds

arXiv:cond-mat/0107262 · doi:10.1016/S0921-4526(01)01202-9

Abstract

Bulk-sensitive high-resolution Ce 4f spectra have been obtained from 3d $\to$ 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.

arXiv commentsubmitted to SCES 2001, two-columnn format, modified text

Direct experimental verification of applicability of single-site model for angle integrated photoemission of small TK​ concentrated Ce compounds

Abstract

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Direct experimental verification of applicability of single-site model for angle integrated photoemission of small $T_{K}$ concentrated Ce compounds