ANOMALOUS ELECTRON-TRANSPORT BEHAVIOR IN THE ALPHA-ALMNSI APPROXIMANT CRYSTAL - IMPLICATIONS FOR PERFECT ICOSAHEDRAL CRYSTALS

被引:46
作者
BIGGS, BD
PIERCE, FS
POON, SJ
机构
来源
EUROPHYSICS LETTERS | 1992年 / 19卷 / 05期
关键词
D O I
10.1209/0295-5075/19/5/012
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Semi-metallic and unusual transport properties similar to those previously seen in the ordered i-phases are observed in the (1/1) crystalline approximant, also known as alpha-AlMnSi, of the i-AlMnSi system. By examining the electronic properties of the alpha-phase and other related phases of perfect icosahedral (i-) crystals, one can better understand the origins of the anomalous behavior observed. It is shown that the unique band structure effects caused by the icosahedral point group symmetry in the i-phases are responsible for the unusual electronic properties as well as the tendency toward electron localization seen in this new class of semi-metallic materials. The suppression of the anomalous electronic behavior in the amorphous phases and disordered i-phases gives further evidence of the presence of these band structure effects.
引用
收藏
页码:415 / 421
页数:7
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