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ID 25970
本文ファイル
著者
Hosokawa, Shinya
Matsuda, Kazuhiro
Baron, Q.R. Alfred
NDC
物理学
抄録(英)
High-frequency dynamics of liquid Te near the melting temperature has been investigated by the inelastic x-ray scattering measurements. Dynamic structure factors S(Q; E) are obtained at 500, 650 and 800 ±C. Acoustic excitation is ascertained at each temperature: its Q- dependent phase velocity v(Q) switches from high-frequency value vIXS to the ultrasonic value vs at some momentum transfer (Q = Qtrans). With decreasing temperature, both the positiveness (≡ (vIXS - vs)=vs) and the effective length (≡ 2π/Qtrans) increase, which means that the structural relaxation in liquid Te changes much in this temperature region. With the aid of the thermodynamic formulation, we show that it should be an evidence of the dynamical inhomogeneity: it can be much enhanced by the M-NM transition which exists in the supercooled region. The dynamical inhomogeneity may be induced by the second critical phenomena which is similar to liquid water.
掲載誌名
Journal of Physics: Condensed Matter
20巻
49号
開始ページ
494244-1
終了ページ
494244-7
出版年月日
2008
出版者
IOP Publishing Ltd
ISSN
0953-8984
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
Copyright (c) Institute of Physics and IOP Publishing Limited 2009.
関連情報URL
部局名
総合科学研究科