Effect of Inter-Atomic Interaction on Dynamic Susceptibility

概要

論文の詳細を見る
The dynamic transverse susceptibility in the ferronmanetic state is obtained in RPA. In the presence of the inter-atomic interactions other than the exchange type, the effective exchange parameter depends on frequency ω. The effect of this ω-dependence on the spin wave stiffness constant D is examined by taking the band distortion into account. It is found that the above effect can be neglected under various situations and thus the effective exchange parameter emerging in D and be approximated by the static one. As a check of our previous analysis, the intra-atomic contribution to D is estimated by the use of the band structure used by Lowde et al. and the value is found to be consistent with the results given by other authors. From the result found by Gunnarsson for the band distortion, it is inferred that the inter-atomic interaction, other than the exchange type, in the present scheme play an important role in the band distortion.
理論物理学刊行会の論文
1979-03-25