CONFINED AND PROPAGATING PHONONS IN ULTRATHIN CDTE/ZNTE SUPERLATTICES

被引：12

作者：

OH, E

RAMDAS, AK

FROMHERZ, T

FASCHINGER, W

BAUER, G

SITTER, H

机构：

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

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

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.48.17364

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the occurrence of confined longitudinal-optical phonons in (CdTe)n(ZnTe)n (n = 2, 3, and 5) short-period superlattices as observed in their Raman spectra, complementing the infrared reflectivity studies in which confined transverse-optical phonons, were reported [Phys. Rev. B 47, 1998 (1993)]. The dispersion of ZnTe-LO phonons in these highly strained superlattices, determined from the frequencies of the confined phonons, is in agreement with inelastic neutron scattering data on bulk ZnTe. The present study also reveals in these superlattices confined CdTe-LO phonons as well as folded acoustic phonons for n = 5.

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页码：17364 / 17367

页数：4

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