Structural instability and the metal–non-metal transition in expanded fluid metals

Tamura Kozaburo

Inui Masanori

Matsuda Kazuhiro

Ishikawa Daisuke

Journal of Non-Crystalline Solids

X-ray diffraction, small angle X-ray scattering and inelastic X-ray scattering measurements for fluid Hg in the wide density range up to the supercritical region have been carried out using synchrotron radiation at SPring-8. We obtained the static and dynamic structure factors as a function of temperature, pressure and density. Based on the results we found that there exist medium-range fluctuations accompanying the metal–non-metal transition in fluid Hg. The scale of the fluctuations was about 10 A in space and sub-picoseconds in time. We discuss the possibility that such structural instability induces the metal–non-metal transition in expanded fluid Hg.

Acoustic properties and phonons

Liquid alloys and liquid metals

Diffraction and scattering measurements

Microstructure

Phases and equilibria

Structure

X-rays

英語

Elsevier B.V.

Copyright (c) 2007 Published by Elsevier B.V.

[ISSN] 0022-3093

[DOI] 10.1016/j.jnoncrysol.2007.05.124

[NCID] AA00703560

[DOI] http://dx.doi.org/10.1016/j.jnoncrysol.2007.05.124