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ID 40638
file
creator
Ishikawa, D.
Tamura, K.
Tsutsui, S.
Baron, A.P.R.
subject
A. metals
C. high pressure
D. phase transition
D. phonons
NDC
Physics
abstract
Liquid Hg undergoes the metal–nonmetal (M–NM) transition when it is expanded from 13.6 g cm−3 at ambient conditions to 9 g cm−3 at high temperature and high pressure. To investigate collective and single particle motions in expanded fluid Hg, we have made inelastic X-ray scattering experiments and obtained the dynamic structure factor, S(Q,ω), of fluid Hg. We analyzed S(Q,ω) within the framework of generalized hydrodynamics and found that the excitation energies of collective modes disperse three times as fast as the hydrodynamic sound velocity in the M–NM transition region at 9 g cm−3. The results indicate the existence of fast sound in expanded fluid Hg accompanying the metal–non-metal transition and strongly hint that fluctuations intrinsic to the M–NM transition are induced on atomic length scale and sub-picosecond time scale.
journal title
Journal of Physics and Chemistry of Solids
volume
Volume 66
issue
Issue 12
start page
2223
end page
2229
date of issued
2005-12
publisher
Elsevier
issn
0022-3697
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
(c)2005 Elsevier Ltd. All rights reserved.
relation is version of
http://doi.org/10.1016/j.jpcs.2005.09.021
department
Graduate School of Integrated Arts and Sciences



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