Pressure-induced phase transition in quasi-1D mixed-valence gold complexes

被引：1
|
作者：
Liu, XJ [1 ]
Moritomo, Y
Nakamura, A
Matsuba, S
Kojima, N
机构：
[1] Nagoya Univ, Ctr Integrated Res Sci & Engn, Nagoya, Aichi 4648601, Japan
[2] Univ Tokyo, Grad Sch Arts & Sci, Tokyo 1538902, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2000年 / 69卷 / 10期
关键词：
valence disproportion; phase transition; high-pressure Raman spectroscopy; quasi-one-dimensional system;
D O I：
10.1143/JPSJ.69.3158
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Pressure effects on Raman spectra have been investigated in quasi-one-dimensional (quasi-1D) mixed-valence (MV) gold complexes [AuX(DBS)][AuX3(DBS)] (X = Br and CL, DBS=dibenzylsulfide) at 300 K. We have observed pressure-induced deactivation of a Raman-active Au-X stretching mode, indicating a pressure-induced phase transition from the MV state to a single-valence (SV) state. The critical pressure P-c for the phase transition increases from similar to 8GPa for X = Br to similar to 17GPa for X = Cl, perhaps due to the enhanced displacement of halogen ions from the central position.
引用
收藏
页码：3158 / 3161
页数：4
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