Transverse excitations in liquid Sn
Transverse excitations in liquid Sn
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DOI：
10.1088/0953-8984/25/11/112101
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发表时间：
2013-03-20
影响因子：
2.7
通讯作者：
Hoshino, K.
中科院分区：
文献类型：
--
作者：
Hosokawa, S.;Munejiri, S.;Hoshino, K.
在液态锡的非弹性X射线散射谱中观察到横向声（TA）激发模式。TA模式的激发能和宽度与从头算分子动力学模拟的结果吻合得很好。通过定量比较电流相关谱的实验值和理论值，我们得出结论：通过纵向电流相关谱中的准TA分支，可以在实验上检测到TA模。TA模式的寿命和传播长度被确定为类似于0.7 ps和0.8-1.0 nm，分别对应于在液态Sn中瞬时形成的笼的大小。
Transverse acoustic (TA) excitation modes were observed in inelastic x-ray scattering (IXS) spectra of liquid Sn. The excitation energies and widths of the TA modes are in good agreement with results of an ab initio molecular dynamics simulation. By comparing current correlation spectra between the experimental and theoretical results quantitatively, we have concluded that the TA modes can be detected experimentally through the quasi-TA branches in the longitudinal current correlation spectra. The lifetime and propagation length of the TA modes were determined to be similar to 0.7 ps and 0.8-1.0 nm, respectively, corresponding to the size of cages formed instantaneously in liquid Sn.