Record number :
1791185
Title of article :
Effect of magnon–phonon interaction on phonon damping of two-dimensional Heisenberg ferromagnetic system at finite temperature
Author/Authors :
Cheng، نويسنده , , Tai-Min and Li، نويسنده , , Lin and Xianyu، نويسنده , , Ze، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
6
From page :
89
To page :
94
Abstract :
A magnon–phonon interaction model is developed on the basis of a two-dimensional square Heisenberg ferromagnetic system. By using Matsubara Green function theory we studied the transverse and longitudinal acoustic phonon dampings and calculated the transverse and longitudinal acoustic phonon damping curves on the main symmetric point and line in the first Brillouin zone. It is found that on the line Δ there is no damping for transverse acoustic phonon and on the line Z there is no damping for longitudinal acoustic phonon. In the first Brillouin zone the damping of transverse acoustic phonons is at least one order larger than that of longitudinal acoustic phonons. The influences of various parameters on transverse and longitudinal acoustic phonon dampings are discussed and the lifetime and the density of state of transverse and longitudinal acoustic phonons are explored as well according to the relation of the phonon damping and its lifetime and the relation of the phonon damping and its density of state.
Keywords :
D. Phonon lifetime , D. Longitudinal acoustic phonon damping , D. Transverse acoustic phonon damping , D. Magnon–phonon interaction
Journal title :
Solid State Communications
Journal title :
Solid State Communications
Serial Year :
2007
Link To Document :
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