Department of Physics, University of Kalyani, Kalyani-741235, West Bengal, India
Online published on 29 December, 2017.
The role of Hubbard type interaction between d-electrons has been studied using a four-site extended Falicov-Kimball model. A discontinuousvalence transition has been observed. Specific heat curves show a double-peak structure for E<Ec. Theeffect of this interaction on entropy has also been examined. A Curie contribution to susceptibility is noticed.
Mixed-valent systems, Falicov-Kimball model, Hubbard type interaction
