液体金属の横波モード : 高校物理の教科書の常識を覆すのか?

URI http://harp.lib.hiroshima-u.ac.jp/it-hiroshima/metadata/9765
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Title
液体金属の横波モード : 高校物理の教科書の常識を覆すのか?
Author
氏名 細川 伸也
ヨミ ホソカワ シンヤ
別名 Hosokawa Shinya
Subject
Inelastic x–ray scattering
Particle dynamics
Liquid metals
Excitation modes
Abstract

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. The transverse excitations are also observed in liquid Fe and Cu, which again indicate the existence of small clusters. In these liquid metals, the short–living cluster may originate from icosahedra, which are characteistic of liquid transition metals.

Journal Title
広島工業大学紀要. 研究編
Volume
45
Spage
175
Epage
187
Published Date
2011
Publisher
広島工業大学
ISSN
1346-9975
NCID
AA11599110
NAID
40018724480
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
出版社版
Old URI
Set
it-hiroshima