Specific heat of a Coqblin-Schrieffer model with crystal fields: New crossover features and scaling properties
- 1 November 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 32 (9) , 6100-6103
- https://doi.org/10.1103/physrevb.32.6100
Abstract
The exact thermodynamic equations of the Coqblin-Schrieffer model for a quartet ionic ground state split into two doublets have been solved numerically. The model describes cerium systems in certain noncubic crystal fields. The crossover from weak to strong crystal fields has been studied. For intermediate fields a shoulderlike form of the specific heat has been found. When the field is increased this feature separates into two distinct peaks. The scaling into the large-field limit has been obtained analytically.Keywords
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