Open AccessThe softening of magnon of two-dimensional insulating ferromagnets at low temperatures
Author(s) -
Taimin Cheng,
Xian Yu-Ze,
An Du,
Zou Jun-Ding
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.2239
Subject(s) - magnon , condensed matter physics , brillouin zone , phonon , laser linewidth , softening , ferromagnetism , dispersion relation , dispersion (optics) , materials science , spin wave , physics , quantum mechanics , laser
A magnon-phonon interaction model is applied to two_dimensional insulating ferro magnets. By using Matsubara Green function theory, we have studied the magonon spectrum, and calculated the magnon dispersion curve on the main symmetric point and line in the Brillouin Zone for different parameters of the system. It is con cluded that at the boundary of Brillouin Zone there is a strong broadening in th e magnon linewidth and softening. The influences of longitudinal phonon and tran sverse phonon on the softening and broadening in the magnon linewidth are compar ed, and the influences of the parameters are also illustrated.