Temperature dependence of the dynamical effective charge in Ag3SI

被引：16

作者：

Aniya, M

Wakamura, K

机构：

[1] OKAYAMA UNIV SCI,DEPT NAT SCI,OKAYAMA 700,JAPAN

[2] KUMAMOTO UNIV,FAC GEN EDUC,DEPT PHYS,KUMAMOTO 860,JAPAN

来源：

SOLID STATE IONICS | 1996年 / 86-8卷

关键词：

Ag3SI; dynamical effective charge; phonon frequencies; chemical bond;

D O I：

10.1016/0167-2738(96)00119-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The temperature dependence of the phonon frequencies and effective charges in the superionic material Ag3SI is reported. It was found that the effective change decreases with temperature T in the gamma-phase, jumps at the gamma-beta phase transition point T=157 K, remains almost insensitive to T until immediately above the beta-alpha phase transition at T=519 K, and increases rapidly with T in the alpha-phase. The behavior has been explained based on a model in which the basic process is the local fluctuation of the chemical bond.

引用

页码：183 / 186

页数：4

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