OPTICAL CONDUCTIVITY OF THE STABLE ICOSAHEDRAL QUASI-CRYSTAL AL63.5CU24.5FE12

被引：92

作者：

HOMES, CC ^{[1
]}

TIMUSK, T ^{[1
]}

WU, X ^{[1
]}

ALTOUNIAN, Z ^{[1
]}

SAHNOUNE, A ^{[1
]}

STROMOLSEN, JO ^{[1
]}

机构：

[1] MCGILL UNIV,DEPT PHYS,MONTREAL H3A 2T8,QUEBEC,CANADA

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.67.2694

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The optical properties of the stable icosahedral quasicrystal Al63.5Cu24.5Fe12 have been measured from 40 to 25000 cm-1 at 300 K and at 80 K. Unlike metallic glasses with a Drude spectrum with strong elastic scattering by disorder, or semiconductors with a conductivity gap, the optical conductivity of this quasicrystal is distinctive: Starting from the very low dc value it increases linearly with frequency well into the near infrared. A prominent peak in the conductivity is observed at 245 cm-1; its position and strength suggest that it arises from a direct excitation of phonons.

引用

页码：2694 / 2696

页数：3

共 24 条

[1] ELECTRONIC-PROPERTIES OF ICOSAHEDRAL, APPROXIMANT, AND AMORPHOUS PHASES OF AN AL-CU-FE ALLOY [J].