Origin of heavy-fermion behavior in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CeCu</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span><span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">Si</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>

J.-S. Kang; J. W. Allen; O. Gunnarsson; N. E. Christensen; O. K. Andersen; Y. Lassailly; M. B. Maple; M. S. Torikachvili

doi:10.1103/PhysRevB.41.6610

Origin of heavy-fermion behavior in ${CeCu}_{2}$ ${Si}_{2}$

J.-S. Kang, J. W. Allen, O. Gunnarsson, N. E. Christensen, O. K. Andersen, Y. Lassailly, M. B. Maple, and M. S. Torikachvili

Phys. Rev. B 41, 6610 – Published 1 April 1990

Abstract

We report the theoretical analysis of electron spectroscopy data for the heavy-fermion superconductor ${CeCu}_{2}$ ${Si}_{2}$ , using the impurity Anderson Hamiltonian applied to the Ce 4f electrons. A good description of the spectra for ${CeCu}_{2}$ ${Si}_{2}$ is obtained, using rescaled ab initio hybridization matrix elements. The spectra are generally consistent with a Kondo Fermi-liquid description of this material. Near trivalence and a very small Kondo temperature are controlled more by hybridization of Ce 4f to Si and Cu s/p than to Cu 3d states.

Received 28 August 1989

DOI:https://doi.org/10.1103/PhysRevB.41.6610

Authors & Affiliations

J.-S. Kang

Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120
Department of Physics and Institute for Pure and Applied Physical Sciences, University of California at San Diego, La Jolla, California 92093

J. W. Allen