Publication Details:
Journal or Publication Title:
Armenian Journal of Physics=Ֆիզիկայի հայկական հանդես
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Title:
d-f EXCHANGE INTERACTION INDUCED VALENCE TRANSITION IN MIXED-VALENCE SYSTEMS
Creator:
Piuli Mukherjee ; S. K. Bhowmick ; N. K. Ghosh
Subject:
Physics of elementary particles ; Physics
Coverage:
Abstract:
Role of exchange interaction is studied using extended Falicov–Kimball model. A discontinuous valence transition is observed at a critical f-level energy. Transition is sharper for smaller exchange interaction. A double-peak structure in specific heat appears for E < =Ec. For antiferromagnetic type of exchange interaction, a Curie contribution to the susceptibility is observed.