Influence of halogen substitution on optical property of mixed-valence gold halide investigated by photoacoustic spectroscopy

被引：0

作者：

Liu, XJ ^{[1
]}

Niu, DL ^{[1
]}

Zhang, SY ^{[1
]}

机构：

[1] Nanjing Univ, State Key Lab Modern Acoust, Nanjing 210093, Peoples R China

来源：

JOURNAL DE PHYSIQUE IV | 2005年 / 125卷

关键词：

D O I：

10.1051/jp4:2005125005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Influence of halogen substitution on the absorption spectra in the mixed-valence gold halide Cs2Au2X6 (X = CI, Br, and 1) has been investigated by means of photoacoustic (PA) spectroscopy in the energy range of 1.0 similar to 3.5 eV at 300 K. The optical gap (E-gap), which is assigned to the charge transfer from Au(+)5dx(2)-y(2) to An(3+)5dX(2)-y(2) levels, shows a red shift from 1.61 eV for X = CI to 1.18 eV for X = 1. We have ascribed the reduced E-gap-value to the suppression of the structural distortion of AuX4-.

引用

页码：19 / 21

页数：3

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