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On the Existence of Spin Waves in a Model Transition Metal with Finite Anderson Mixing Potential
Author(s) -
Zieliński J.
Publication year - 1976
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.2220740240
Subject(s) - hamiltonian (control theory) , mixing (physics) , condensed matter physics , physics , anderson impurity model , coupling constant , exchange interaction , quantum mechanics , mathematics , ferromagnetism , mathematical optimization , electron
Abstract Interband s–d exchange interaction is added to the transition metal model Hamiltonian involving the Anderson mixing term. Spin waves are shown to exist even when the Anderson mixing potential remains finite. The value of the exchange coupling constant which makes this possible depends on the mutual localization of s‐and d‐like bands and on the shape of the density of states function of the s‐like band.