Observation of a wurtzite form of gallium arsenide

被引：97

作者：

McMahon, MI

Nelmes, RJ

机构：

[1] Univ Edinburgh, Sch Phys, SUPA, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.95.215505

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

After a pressure decrease to ambient, the high-pressure SC16 phase of GaAs is found to transform to the hexagonal wurtzite structure. This has been suggested for GaAs in calculations but never previously observed experimentally. Wurtzite-GaAs is found to be stable at ambient pressures at temperatures up to 473 K, with a structure that is only slightly distorted from ideal. On recompression, the c/a ratio is constant with pressure and wurtzite-GaAs transforms to the orthorhombic Cmcm phase at 18.7(9) GPa.

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页数：4

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