Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 25, Issue 11, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/25/11/112101
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Funding
- Japan Society for the Promotion of Science (JSPS) [22540403, 24540406, 23340106, 22540389]
- Grants-in-Aid for Scientific Research [23340106, 24740265, 22540403, 24540406, 22540389] Funding Source: KAKEN
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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.
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