IFW Dresden, Institute for Complex Materials, Dresden, Germany.
J Phys Condens Matter. 2012 Sep 26;24(38):385802. doi: 10.1088/0953-8984/24/38/385802. Epub 2012 Sep 3.
The structure of Ge(5)As(x)Se(95-x) (x = 10, 20, 30, 38 at.%) and Ge(15)As(x)Se(85-x) (x = 10, 25, 34 at.%) glasses has been investigated by high-energy x-ray diffraction and extended x-ray absorption fine structure measurements. The experimental datasets have been modelled using the reverse Monte Carlo simulation technique. The model atomic configurations have been analysed in detail. It has been found that the homonuclear Ge-Ge, As-As, Se-Se and heteronuclear Ge-As bonds play an important role in the structure formation of the Ge-As-Se glasses. The total number of these bonds decreases quite slowly with the mean coordination number similarly to the nonlinear refractive index.
通过高能 X 射线衍射和扩展 X 射线吸收精细结构测量研究了 Ge(5)As(x)Se(95-x)（x = 10、20、30、38 原子%）和 Ge(15)As(x)Se(85-x)（x = 10、25、34 原子%）玻璃的结构。使用反向蒙特卡罗模拟技术对实验数据集进行建模。详细分析了模型原子构型。结果表明，同核 Ge-Ge、As-As、Se-Se 和杂核 Ge-As 键在 Ge-As-Se 玻璃的结构形成中起着重要作用。这些键的总数随着平均配位数的增加而缓慢减少，与非线性折射率相似。
