Pressure and temperature dependence of the structure of liquid InSb
Pressure and temperature dependence of the structure of liquid InSb
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DOI：
10.1103/physrevb.72.064205
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发表时间：
2005-08
影响因子：
3.7
通讯作者：
T. Hattori;T. Kinoshita;N. Taga;Y. Takasugi;Tetsuji Mori;K. Tsuji
中科院分区：
文献类型：
--
作者：
T. Hattori;T. Kinoshita;N. Taga;Y. Takasugi;Tetsuji Mori;K. Tsuji
我们用同步辐射x射线衍射法研究了InSb液体在20 GPa宽压力范围和1570K温度范围内的结构。随着压力沿熔化曲线的增加，在环境压力附近呈各向异性的局部组织变得更加各向同性。然而，当气压高于约10 Gpa时，压力引起的变化变得不那么明显，局部结构几乎均匀收缩。在这个压力区，结构参数明显偏离简单液态金属的结构参数，表现出稳定的液态形态和各向异性的局部结构。对$g(R)$的分析表明，液体可能是由单一物种的局部结构解释的，其$g(R)$显然是由$\ensuremath{\beta}\text{\ensuremath{-}}\mathrm{Sn}$-like的$g(R)$和类似bcc的局部结构的线性组合以一比一的比例表示的。这种局部结构与其水晶结构中的结构完全不同。在与Rapoport两物种模型的关系中，讨论了局部结构对压力和温度的依赖关系[J.太棒了。46,2891(1967)]。
We investigate the structure of liquid InSb over a wide pressure range up to 20 GPa and a wide temperature range up to 1570 K by synchrotron x-ray diffraction. With increasing pressure along the melting curve, the local structure, which is anisotropic near the ambient pressure, becomes more isotropic. However, at pressures higher than about 10 GPa, the pressure-induced change becomes less prominent, and the local structure contracts almost uniformly. Structural parameters deviate significantly from those in simple liquid metals in this pressure region, revealing a stable liquid form with an anisotropic local structure. The analysis of $g(r)$ reveals that the liquid is possibly interpreted by the local structure of a single species, whose $g(r)$ is apparently expressed by a linear combination of $g(r)$ for $\ensuremath{\beta}\text{\ensuremath{-}}\mathrm{Sn}$-like and bcc-like local structures in a one-to-one ratio. This local structure is completely different from those present in its crystalline counterpart. Pressure and temperature dependence of the local structure is discussed in the relation to Rapoport two species model [J. Chem. Phys. 46, 2891 (1967)].