Anisotropic phasonic diffuse scattering from decagonal quasicrystals

被引：13

作者：

Ishii, Y ^{[1
]}

机构：

[1] Chuo Univ, Dept Phys, Bunkyo Ku, Tokyo 1128551, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 294卷

关键词：

quasicrystal; diffuse scattering; phason; decagonal phase;

D O I：

10.1016/S0921-5093(00)01134-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In spite of its isotropic elastic (phonon) properties, anisotropic diffuse scattering is observed in icosahedral quasicrystals and interpreted as a consequence of softening of a particular mode of phasons near hydrodynamic instability. In a decagonal case, the phason elastic energy is isotropic and no anisotropic phason disorder is expected. We show that, nevertheless, the anisotropic diffused scattering from the decagonal quasicrystals is expected through the phason-phonon coupling. We calculate a line shape of the diffuse scattering based on the elasticity theory for 10/mmm and (10) over barm(2) symmetries. Physical meanings of such diffuse scattering are discussed in contrast to Huang scattering. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：377 / 380

页数：4

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