The structures of normal and supercooled liquid silicon metal and SiGe alloy
The structures of normal and supercooled liquid silicon metal and SiGe alloy
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DOI：
10.1016/j.jnoncrysol.2007.05.176
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发表时间：
2007-10
影响因子：
3.5
通讯作者：
S. Krishnan;L. Hennet;T. Key;B. Glorieux;M. Saboungi;D. Price
中科院分区：
文献类型：
--
作者：
S. Krishnan;L. Hennet;T. Key;B. Glorieux;M. Saboungi;D. Price
本文用X射线衍射法测量了液态金属硅和SiGe合金在正常和过冷液态下的原子结构。测量覆盖了宽范围的散射矢量Q（0.8- 20 A −1）和宽温度范围，延伸到过冷区域。目前的研究结果证实了早期的测量，表明在第一壳协调增加过冷减少。对于液态SiGe，结构因子S（Q）中第一个峰的高Q侧的肩部随着过冷度的增加而变尖，这表明共价键的增加和化学短程有序的发展。
The atomic structures of liquid Si metal and SiGe alloy in the normal and supercooled liquid states have been measured by X-ray diffraction from aerodynamically levitated and laser heated liquid droplets. The measurements covered a wide range of scattering vector Q (0.8–20A−1) and a wide temperature range that extended into the supercooled region. The present results on liquid Si confirm earlier measurements that showed a decrease in first-shell coordination with increased supercooling. For liquid SiGe, the shoulder on the high-Q side of the first peak in the structure factor S(Q) sharpens with increased supercooling, suggesting an increase in covalent bonding and development of chemical short-range order.