CONFINED TRANSVERSE-OPTICAL PHONONS IN ULTRATHIN CDTE/ZNTE SUPERLATTICES

被引：23

作者：

FROMHERZ, T ^{[1
]}

HAUZENBERGER, F ^{[1
]}

FASCHINGER, W ^{[1
]}

HELM, M ^{[1
]}

JUZA, P ^{[1
]}

SITTER, H ^{[1
]}

BAUER, G ^{[1
]}

机构：

[1] JOHANNES KEPLER UNIV,INST EXPTL PHYS,A-4040 LINZ,AUSTRIA

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.47.1998

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report far-infrared reflectivity measurements on short-period (CdTe)n/(ZnTe)n (n = 2,3,4,5) superlattices. The superlattices were grown by atomic-layer epitaxy on a thick ZnTe buffer deposited on [001]-oriented GaAs substrates. The frequencies of transverse-optical phonon modes confined in the CdTe layers decrease systematically with increasing number of monolayers, n, whereas the corresponding confined modes in the ZnTe layers do not depend on n. It is shown that these data allow one to map out the dispersion of the transverse-optical modes along the [001] direction in both CdTe and ZnTe. Furthermore, the strain distribution in the superlattices is analyzed.

引用

页码：1998 / 2002

页数：5

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