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APW Research of Europium Monochalcogenides. I. Band Structures and Electron—Electron Interaction in Ferromagnetic Semiconductors
Author(s) -
Farberovich O. V.,
Vlasov S. V.
Publication year - 1981
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.2221050238
Subject(s) - europium , ferromagnetism , condensed matter physics , electron , exchange interaction , coulomb , electronic band structure , excited state , physics , chemistry , atomic physics , ion , quantum mechanics
The augmented plane wave method (APW) is used for a theoretical study of the electron properties of europium monochalcogenides. Spin‐polarized energy band calculations of the ferromagnetic EuO, EuS, and EuSe explain qualitatively the exchange interactions therein. Based on the APW data in the frame of perturbation theory the Coulomb electron—electron interaction at the 4f shell of europium is taken into account for EuO and EuS. The band structures and the multiplet terms of the f 6 d and 3d 9 4f 8 excited states gives a new interpretation of a known experimental spectra for these compounds.