Excitons and optical properties of α-quartz

被引：82

作者：

Chang, EK ^{[1
]}

Rohlfing, M

Louie, SG

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Munster, Inst Theoret Phys 2, D-48149 Munster, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.85.2613

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an ail initio study of the optical properties of ru-quartz. The absorption spectrum is calculated by solving the Bethe-Salpeter equation for the interacting electron-hole system and found to be in excellent agreement with the measured spectrum up to 10 eV above the absorption threshold. We find that excitonic effects are crucial in understanding the sharp features in the absorption spectrum in this energy range. They are also crucial in the nb initio computation of the static dielectric constant, significantly enhancing its value.

引用

页码：2613 / 2616

页数：4

共 15 条

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