Premium
The theory of magnetic polarons in antiferromagnetic semiconductors
Author(s) -
Egorov B. V.,
Timofeev B. B.
Publication year - 1983
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.2221190110
Subject(s) - polaron , antiferromagnetism , condensed matter physics , spins , electron , physics , magnon , spin (aerodynamics) , semiconductor , quantum mechanics , ferromagnetism , thermodynamics
The electron states in antiferromagnetic semiconductors with large atomic spins S and an arbitrary relation between the band width Δ E and the spin—electron interaction A are considered. It is shown that in the mean‐field approximation of atomic spins the spin—electron interaction in case of AS ≧ Δ E leads to essential transformations in the electron spectrum, while the interactions of electrons with the spin deviations from the average values (at T = 0 with virtual magnons) leads to a polaron‐type quasi‐particle formation: the antiferromagnetic polaron (AFP). With the help of the diagram technique at T = 0 the AFP Green function and its spectrum are obtained.