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Role of Magnetization in the Electron Quasiparticle Energy in the s–d Model of Ferromagnetic Semiconductors
Author(s) -
Čápek 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.2221030110
Subject(s) - quasiparticle , magnetization , condensed matter physics , physics , electron , ferromagnetism , function (biology) , position (finance) , quantum mechanics , magnetic field , superconductivity , finance , evolutionary biology , economics , biology
It is shown how the method of momenta based on fitting the lowest momenta of the spectral function may be reconciled with general arguments requiring that the magnetization can enter neither the position nor the form of quasiparticle peaks in the spectral function. The magnetization then enters just the weights of quasiparticle poles. Therefore, the temperature dependence of the quasiparticle energies strongly suppressed, in contrast to most of the contemporary theories.