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Dyson‐Maleev Transformation and Three‐Magnon Problem for an s = ½ Ferromagnet
Author(s) -
Gochev I. G.
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.2220740133
Subject(s) - magnon , hamiltonian (control theory) , ferromagnetism , anisotropy , physics , condensed matter physics , transformation (genetics) , mathematical physics , quantum mechanics , mathematics , chemistry , biochemistry , gene , mathematical optimization
Non‐physical three‐magnon states at real energies of Dyson's Hamiltonian were found. Longitudinal anisotropy and interaction between nearest neighbours were taken into account.