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Simple Two‐Band s–d Model for Ferromagnetic Semiconductors with Hybridization
Author(s) -
Szőcs V.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220980111
Subject(s) - decoupling (probability) , electron , condensed matter physics , ferromagnetism , semiconductor , simple (philosophy) , physics , density of states , magnetic semiconductor , electronic band structure , quantum mechanics , philosophy , epistemology , control engineering , engineering
A simple two‐band model with hybridization between conducting s‐electrons and localized d ‐(or f‐) electrons for ferromagnetic semiconductors in their low electron density regime is suggested and analyzed. Čápek's decoupling scheme is used for the time‐dependent Zubarev Green functions. A closed form is obtained for the spin‐dependent self‐energy. For a special case, the density of states is evaluated numerically.