Role of Inter-site Hybrid Interactions in Itinerant Ferromagnetism

Details Role of Inter-site Hybrid Interactions in Itinerant Ferromagnetism Role of Inter-site Hybrid Interactions in Itinerant Ferromagnetism

2003-12-12

arxiv.org/abs/cond-mat/0312309v1

Physics

Condensed Matter

Strongly Correlated Electrons

32 pages, 18 Figures

Scientific paper

10.1016/j.jpcs.2004.01.013

We study role of inter-site hybrid interactions in deciding ferromagnetic state in the itinerant electron (narrow band) systems like some of the transition metals. We have considered Hubbard like tight binding model alongwith exchange and hybrid interactions. All interactions have been treated within mean-field approximation. It is found here that hybrid interactions play significant role at zero as well as infinite temperatures in deciding on-set of ferromagnetic state. We have studied variation of effective mass of up and down spin electrons in ferromagnetic state as a function of temperature. Also studied are magnetic susceptibility, optical conductivity and magnetoresistance as a function of temperature.

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