Theory of intermediate valence. III. Electronic specific heat
- 1 May 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 21 (9) , 4154-4158
- https://doi.org/10.1103/physrevb.21.4154
Abstract
A theory of mixed valence, presented previously, is used to calculate the electronic specific heat. Two calculations are carried out: one in the Hartree-Fock approximation and another in the high-hybridization limit by means of a Hubbard-like decoupling scheme. It is found that the admixture of localized, ionic states into the band of itinerant electrons results in a reduction of the bandwidth, and a consequent enhancement of the specific heat by a factor of up to 2. In addition, for systems different from the almost empty or the almost full band, electron-electron correlation effects result in an extra narrowing of the band with a further enhancement of the specific heat by an additional factor of up to approximately 3.Keywords
This publication has 10 references indexed in Scilit:
- New approach to the theory of intermediate valence. I. General formulationPhysical Review B, 1979
- New approach to the theory of intermediate valence. II. Magnetic susceptibility and magnetic instabilitiesPhysical Review B, 1979
- Theory of the inelastic magnetic scattering in mixed valence compounds: CePdJournal of Physics C: Solid State Physics, 1978
- Localized-electron mechanism for configuration mixing in Sm compoundsPhysics Letters A, 1975
- Electron correlations in narrow energy bands VI. The connexion with many-body perturbation theoryProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1967
- Electron correlations in narrow energy bands V. A perturbation expansion about the atomic limitProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1967
- Electron correlations in narrow energy bands - IV. The atomic representationProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1965
- Electron correlations in narrow energy bands III. An improved solutionProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964
- Electron correlations in narrow energy bands. II. The degenerate band caseProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1964
- Electron correlations in narrow energy bandsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963