Pressure- and photo-induced phase transition in mixed-valence gold complexes

被引：4

作者：

Liu, XJ

Moritomo, Y

Nakamura, A ^{[1
]}

Kojima, N

机构：

[1] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, Ctr Integrated Res Sci, Nagoya, Aichi 4648603, Japan

[3] Univ Tokyo, Grad Sch Arts & Sci, Tokyo 1538902, Japan

来源：

PHASE TRANSITIONS | 2001年 / 74卷 / 1-2期

关键词：

pressure induced phase transition; photoinduced phase transition; Cs2Au2X6; (X; Cl; Br; and I); Raman scattering study;

D O I：

10.1080/01411590108224565

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The pressure- and photo-induced phase transition in mixed-valence gold complexes of Cs2Au2X6 (X = Cl, Br, and I) has been investigated by means of the Raman scattering. The Raman-active Au-X stretching modes were deactivated by the pressure, which indicates a pressure-induced phase transition from the mixed-valence (MV) state to the single-valence (SV) state. The electronic phase diagrams Of Cs2Au2X6 (X = Cl and Br) as a function of pressure and temperature have been derived. A photoinduced phase transition from the MV state to the SV state has been found for Cs2Au2Br6. The observed time behavior accompanying this phase transition is successfully interpreted by the Avrami model, indicating the three-dimensional character of the MV cluster growth.

引用

页码：51 / 92

页数：42

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