Transverse acoustic excitations in liquid Ga.
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,omega) 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.
Hosokawa
S
S
Center for Materials Research Using Third-Generation Synchrotron Radiation Facilities, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan. hosokawa@cc.it-hiroshima.ac.jp
Inui
M
M
Kajihara
Y
Y
Matsuda
K
K
Ichitsubo
T
T
Pilgrim
W-C
WC
Sinn
H
H
González
L E
LE
González
D J
DJ
Tsutsui
S
S
Baron
A Q R
AQ