Hubbard operators and spin-wave theory of Heisenberg magnets with arbitrary spin
Teoretičeskaâ i matematičeskaâ fizika, Tome 50 (1982) no. 3, pp. 466-476
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A new method is proposed for constructing a spin-wave theory based on the exact connectior, between the spin operators and the Hubbard operators and making it possible to find simultaneously both the spin wave spectrum (in the Tyablikov approximation) as well as the population numbers of levels with different spin projections. For anisotropic ferromagnets and antiferromagnets a dispersion relation is obtained for the spin waves with exact allowance for the single-ion anisotropy It is established that there is a threshold with respect to the anisotropy and the temperature above which the spin-wave theory does not hold.
@article{TMF_1982_50_3_a16,
author = {V. V. Val'kov and S. G. Ovchinnikov},
title = {Hubbard operators and spin-wave theory of {Heisenberg} magnets with arbitrary spin},
journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
pages = {466--476},
publisher = {mathdoc},
volume = {50},
number = {3},
year = {1982},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/TMF_1982_50_3_a16/}
}
TY - JOUR AU - V. V. Val'kov AU - S. G. Ovchinnikov TI - Hubbard operators and spin-wave theory of Heisenberg magnets with arbitrary spin JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1982 SP - 466 EP - 476 VL - 50 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1982_50_3_a16/ LA - ru ID - TMF_1982_50_3_a16 ER -
%0 Journal Article %A V. V. Val'kov %A S. G. Ovchinnikov %T Hubbard operators and spin-wave theory of Heisenberg magnets with arbitrary spin %J Teoretičeskaâ i matematičeskaâ fizika %D 1982 %P 466-476 %V 50 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1982_50_3_a16/ %G ru %F TMF_1982_50_3_a16
V. V. Val'kov; S. G. Ovchinnikov. Hubbard operators and spin-wave theory of Heisenberg magnets with arbitrary spin. Teoretičeskaâ i matematičeskaâ fizika, Tome 50 (1982) no. 3, pp. 466-476. http://geodesic.mathdoc.fr/item/TMF_1982_50_3_a16/