Abstract
A simple model for the phase transition in Ce is presented. It is based on the change of occupation number of the 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 -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