Fast sound in expanded fluid Hg accompanying the metal-nonmetal transition

被引：43

作者：

Ishikawa, D ^{[1
]}

Inui, M

Matsuda, K

Tamura, K

Tsutsui, S

Baron, AQR

机构：

[1] Kyoto Univ, Grad Sch Engn, Kyoto 6068501, Japan

[2] RIKEN, SPring 8, Mikazuki, Hyogo 6795148, Japan

[3] Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 7398521, Japan

[4] JASRI, SPring 8, Mikazuki, Hyogo 6795198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.93.097801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamic structure factor S(Q,omega) of expanded fluid Hg has been measured up to the metal-nonmetal transition region at 9.0 g cm(-3) (1723 K and 1940 bars) using high-resolution inelastic x-ray scattering, at momentum transfers, Q, from 0.2 to 4.8 Angstrom(-1). Analysis in the framework of generalized hydrodynamics reveals that the frequencies of the collective excitations increase faster with Q than estimated from the macroscopic speed of sound. The effective sound velocity at 9.0 g cm(-3) estimated from the dispersion relation is triple the ultrasonic sound velocity. The present result suggests the existence of fast sound in expanded fluid Hg accompanying the metal-nonmetal transition.

引用

页码：097801 / 1

页数：4

共 25 条

[1] FAST SOUND IN LIQUID WATER [J].