Scaling relation of spin-wave lifetime in double-exchange systems

被引：9

作者：

Furukawa, N

Hirota, K

机构：

[1] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 106, Japan

[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 980, Japan

来源：

PHYSICA B | 1997年 / 241卷

关键词：

double exchange; CMR; manganites; spin excitation;

D O I：

10.1016/S0921-4526(97)00716-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Spin-excitation spectrum of CMR manganites are studied from both theoretical and experimental points of view. Scaling relations for the spin-wave lifetime in the electronic model with double-exchange interaction is observed, which is consistent with results for neutron inelastic-scattering experiments for (La,Y)(0.8)Sr0.2MnO3. Roles of other interactions and degrees of freedom such as polaron effects are also discussed. (C) 1998 Elsevier Science B.V. All rights reserved.

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页码：780 / 785

页数：6

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