Collective dynamics of liquid Te: The most non-simple liquid metal
Collective dynamics of liquid Te: The most non-simple liquid metal
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液态Te的集体动力学：最非简单的液态金属
DOI：
10.1016/j.jnoncrysol.2005.12.057
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发表时间：
2006
影响因子：
3.5
通讯作者：
F. Albergamo
中科院分区：
文献类型：
--
作者：
S. Hosokawa;W. Pilgrim;F. Demmel;F. Albergamo
用非弹性X射线散射法测量了470°C下液态Te的动态结构因子S（Q，ω）。在低Q区，发现了非弹性激发，这是占主导地位的传播模式。阻尼谐振子分析结果表明，非弹性激发的能量与流体力学值的正偏差约为50%，远大于简单液态金属和几种非简单液态金属中的非弹性激发能量，但与货车der Waals液态Ar和其它液态硫属元素中的非弹性激发能量相似.准弹性线的宽度没有显示出所谓的de Gennes窄化，这可能反映了最近邻关联的强共价性质。
Dynamic structure factor, S(Q,ω), of liquid Te at 470°C was measured by inelastic X-ray scattering. In the low Q region, inelastic excitations were found, which are dominated by propagating modes. Results from a damped harmonic oscillator analysis showed that the energies of the inelastic excitations positively deviate from the hydrodynamic value by about 50%, which is much larger than those in simple liquid metals and several non-simple liquid metals, but similar to those in a van der Waals liquid Ar and in the other liquid chalcogens. The width of the quasielastic line does not show the so-called de Gennes narrowing, which may reflect the strong covalent nature of the nearest-neighbor correlation.