Characteristic temperature dependence of the <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mn>4</mn><mi>f</mi></math></span> occupancy in the Kondo system <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CeSi</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>

C. Grazioli; Z. Hu; M. Knupfer; G. Graw; G. Behr; M. S. Golden; J. Fink; H. Giefers; G. Wortmann; K. Attenkofer

doi:10.1103/PhysRevB.63.115107

Characteristic temperature dependence of the $4 f$ occupancy in the Kondo system ${CeSi}_{2}$

C. Grazioli, Z. Hu, M. Knupfer, G. Graw, G. Behr, M. S. Golden, J. Fink, H. Giefers, G. Wortmann, and K. Attenkofer

Phys. Rev. B 63, 115107 – Published 27 February 2001

Abstract

We present a Ce- $L_{3}$ x-ray absorption spectroscopic study (XAS) of ${CeSi}_{2}$ at different temperatures. The extracted Ce $4 f$ occupancy shows a strong dependence upon temperature that qualitatively agrees with theoretical expectations based on the single-impurity Anderson model. We additionally discuss the reliability of $L_{3}$ XAS performed on nearly trivalent rare-earth compounds in comparison with other high-energy spectroscopy techniques.