Theory of the αγ Phase Transition in Metallic Cerium

Ricardo Ramirez and L. M. Falicov
Phys. Rev. B 3, 2425 – Published 15 April 1971
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Abstract

A simple model for the αγ phase transition in Ce is presented. It is based on the change of occupation number of the f levels, which are assumed to be atomiclike in character, i.e., highly correlated and with a very narrow bandwidth. The change in occupation number is, as a function of temperature, caused by the short-range part of the electron-electron interaction. The theory allows for the existence of a critical point. With the assumption of a linear relationship between f-level occupation numbers and lattice constant, pressure-latticeconstant isotherms are calculated. Curves for the paramagnetic susceptibility as a function of pressure and temperature are also presented.

  • Received 29 June 1970

DOI:https://doi.org/10.1103/PhysRevB.3.2425

©1971 American Physical Society

Authors & Affiliations

Ricardo Ramirez*,† and L. M. Falicov

  • Department of Physics, University of California, Berkeley, California 94720

  • *Chile-California Cooperative Program Fellow (supported by the Ford Foundation); present address: Departamento de Fisica, Facultad de Ciencias Fisicas y Matematicas, Universidad de Chile, Casilla 5487, Santiago, Chile.
  • Work supported in part by the National Science Foundation, through Grant No. GP13889.

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Vol. 3, Iss. 8 — 15 April 1971

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