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ID 40638
本文ファイル
著者
Ishikawa, D.
Tamura, K.
Tsutsui, S.
Baron, A.P.R.
キーワード
A. metals
C. high pressure
D. phase transition
D. phonons
NDC
物理学
抄録(英)
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.
掲載誌名
Journal of Physics and Chemistry of Solids
66巻
12号
開始ページ
2223
終了ページ
2229
出版年月日
2005-12
出版者
Elsevier
ISSN
0022-3697
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
(c)2005 Elsevier Ltd. All rights reserved.
関連情報(IsVersionOf)
http://doi.org/10.1016/j.jpcs.2005.09.021
部局名
総合科学研究科