Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-12-12
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.
Dua Piyush
Panwar Sunil
Singh Ishwar
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