OPTICAL CONDUCTIVITY OF INSULATING AL-BASED ALLOYS - COMPARISON OF QUASI-PERIODIC AND PERIODIC-SYSTEMS

被引：83

作者：

BASOV, DN ^{[1
]}

PIERCE, FS ^{[1
]}

VOLKOV, P ^{[1
]}

POON, SJ ^{[1
]}

TIMUSK, T ^{[1
]}

机构：

[1] UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.73.1865

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the optical conductivity of the structurally ordered icosahedral quasicrystal Al70Pd20Re10 and the crystal Al2Ru obtained from the reflectance measured over a wide frequency range. Our results show that both the crystal and the quasicrystal are semiconductors and have quite similar band structure. The major difference between the two materials arises from the localization of the electronic states deep inside the band gap of the quasicrystal in spite of the metallic carrier density. We speculate that the quasiperiodic symmetry favors carrier localization.

引用

页码：1865 / 1868

页数：4

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