Temperature dependence of lattice vibration spectra for Hg 1-xZnxTe alloys

C. C. Wu, D. Y. Chu, C. Y. Sun, T. R. Yang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The far-infrared reflection spectra of Hg1-xZnxTe crystals with various composition x have been measured at temperatures ranging from 90 to 295 K in the wavenumber region of 60 to 450 cm-1. In all but the pure compounds, HgTe and ZnTe, a two TO phonon structure is clearly observed. The optical phonon frequencies are well determined by Kramers-Kronig integrations and dynamic dielectric function fitting. As the temperature is increased, the lattice vibration frequencies of the ZnTe-like optical mode decreases in the composition range x<or=0.388. A similar situation is found between the temperature dependence of the frequencies of the HgTe-like TO lattice vibration mode and the temperature dependence of energy gap. This indicates that there is a correlation between the HgTe lattice vibration mode and the electronic structure of Hg1-xZnxTe alloys. The approaches which concern the temperature dependence of electronic states and lattice vibration in semiconductors are discussed.

Original languageEnglish
Article number010
Pages (from-to)437-442
Number of pages6
JournalSemiconductor Science and Technology
Volume10
Issue number4
DOIs
Publication statusPublished - 1995 Dec 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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