Influence of spontaneous and piezoelectric polarizations on the phonon frequencies in strained GaN/AlN superlattices

被引：20

作者：

Gleize, J

Frandon, J

Renucci, MA

Bechstedt, F

机构：

[1] Univ Toulouse 3, Phys Solides Lab, CNRS, UMR 5477, F-31062 Toulouse 4, France

[2] Univ Jena, Inst Festkorpertheorie & Theoret Opt, D-07743 Jena, Germany

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.63.073308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of spontaneous and piezoelectric polarizations on the lattice dynamics of a strained GaN/AlN superlattice is investigated within a macroscopic framework. It is found that both effects alter the effective strain in the growth direction of the heterostructure in a significant way. This change in the strain state can also be connected to the internal strain in the GaN and AIN layers. The effects result in a change of the phonon frequencies of GaN and AIN of about 1 and 2 cm(-1), respectively.

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页数：4

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