ANISOTROPY IN THE STRUCTURE OF PRESSURE-INDUCED DISORDERED SOLIDS

被引：59

作者：

TSE, JS

KLUG, DD

机构：

[1] Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.70.174

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular dynamics calculations revealed that a pressure-induced ''amorphized'' solid is disordered and anisotropic but not structurally related to an isotropic quenched melt. The results reproduce and explain the anomalous elastic behavior observed via Brillouin scattering on a quartz [L. E. McNeil and M. Grimsditch, Phys. Rev. Lett. 68, 83 (1991)]. The reversal in frequency shifts for sound propagation in the perpendicular and parallel directions is due to the unequal densification in the a and c directions. The helical chains are found to recover upon depressurizing. Anisotropy of pressure amorphized solids is thus a general property, and pressure-induced amorphization is not related to melting.

引用

页码：174 / 177

页数：4

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[2]

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