著者

Hosokawa S. Inui M. Kajihara Y. Matsuda K. Ichitsubo T. Pilgrim W. -C. Sinn H. Gonzalez L. E. Gonzalez D. J. Tsutsui S. Baron A. Q. R.

出版者

American Physical Society

雑誌

PHYSICAL REVIEW LETTERS (ISSN:00319007)

巻号頁・発行日

vol.102, no.10, 2009-03

被引用文献数

125

---

The transverse acoustic excitation modes were detected by inelastic x-ray scattering in liquid Ga in the Q range above 9  nm-1 although liquid Ga is mostly described by a hard-sphere liquid. An ab initio molecular dynamics simulation clearly supports this finding. From the detailed analysis for the S(Q, ω) spectra with a good statistic quality, the lifetime of 0.5 ps and the propagating length of 0.4–0.5 nm can be estimated for the transverse acoustic phonon modes, which may correspond to the lifetime and size of cages formed instantaneously in liquid Ga.