Correlation between density variation and electrical conductivity in supercritical selenium probed by small angle x-ray scattering
Correlation between density variation and electrical conductivity in supercritical selenium probed by small angle x-ray scattering
复制标题
小角 X 射线散射探测超临界硒密度变化与电导率之间的相关性
DOI：
10.1063/1.1574796
复制
发表时间：
2003
影响因子：
4.4
通讯作者：
J. Simon
中科院分区：
文献类型：
--
作者：
M. Coulet;V. Simonet;Y. Calzavara;D. Testemale;J. Hazemann;D. Raoux;F. Bley;J. Simon
为了研究超临界流体硒中发生的电子-金属和金属-非金属转变，进行了小角X射线散射实验。在半导体到金属的转变，我们没有观察到任何密度波动，表明在这个尺度上的流体的均匀性。另一方面，我们观察到的密度波动和急剧的密度变化的压力-温度范围内的金属-非金属过渡的发病。我们表明，超临界域可以分为两个区域：一个交叉之间发生的liquidlike密度区域和气体。密度波动的开始，即，稀有和致密畴的发展禁止任何渗透并导致金属特性的损失。
Small angle x-ray scattering experiments were performed in order to investigate the semiconductor–metal and metal–nonmetal transitions that take place in supercritical fluid selenium. At the semiconductor to metal transition, we do not observe any density fluctuations indicating the homogeneity of the fluid at this scale. On the other hand, we observe the onset of density fluctuations and a sharp density variation in the pressure-temperature range of the metal–nonmetal transition. We show that the supercritical domain can be separated into two regions: a crossover takes place between a liquidlike density region and a gaslike one. The onset of density fluctuations, i.e., the development of rare and dense domains, forbids any percolation and induces the loss of the metallic character.
使用 I 高能 X 射线进行超临界金属流体的小角度散射 [日语]
DOI：
--
发表时间：
2006
期刊：
rournal of Crystallographic Society of Japan 48
影响因子：
--
作者：
M.Inui;K.Matsuda;D.Ishikawa;K.Tamura
通讯作者：
K.Tamura