Ferromagnetism and Elementary Excitations in the Hubbard Model

Two pecularities of diagram technique for Hubbard operators are established. Fermi‐type excitations for the Hubbard model with strong Coulomb repulsion are investigated with the help of this technique. The cause of ferromagnetism in the Hubbard model is discovered. Bose‐type elementary excitations a...

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Veröffentlicht in:	Physica status solidi. B. Basic research 1985-04, Vol.128 (2), p.513-523
Hauptverfasser:	Nikolaev, M. Yu, Ryzhanova, N. V., Vedyaev, A. V., Zubritskii, S. M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Band and itinerant models Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology General theory and models of magnetic ordering Magnetic properties and materials Physics
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Two pecularities of diagram technique for Hubbard operators are established. Fermi‐type excitations for the Hubbard model with strong Coulomb repulsion are investigated with the help of this technique. The cause of ferromagnetism in the Hubbard model is discovered. Bose‐type elementary excitations are investigated and the region of existence of ferromagnetic ground state is obtained. [Russian text ignored].
ISSN:	0370-1972 1521-3951
DOI:	10.1002/pssb.2221280217