SEGMENT LENGTH DEPENDENCE OF RAMAN FREQUENCY AND OPTICAL-PROPERTIES IN MIXED-HALIDE PTCLXBR1-X CHAIN SOLIDS

被引：13

作者：

HUANG, XZ

SAXENA, A

BISHOP, AR

WORL, LA

LOVE, SP

SWANSON, BI

机构：

[1] LOS ALAMOS NATL LAB,SPECT GRP,LOS ALAMOS,NM 87545

[2] LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES & MAT SCI,LOS ALAMOS,NM 87545

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 84卷 / 10期

关键词：

D O I：

10.1016/0038-1098(92)90801-F

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A systematic spectroscopic study of the mixed-halide MX system PtClxBr1-x reveals a rich and complex resonance Raman spectra dominated by a series of lines which lie between the fundamental symmetric strech (nu1) chain phonon modes of the two constituent pure PtX materials. Each one of these lines comes into resonance at successively different excitation energies. The excitation profiles and observed features (localized phonon modes and fine structure) are accurately predicted to arise from PtBr segments of varying lengths in a PtCl chain within a discrete, 3/4-filled, two-band, tight-binding, extended Peierls-Hubbard model.

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页码：957 / 961

页数：5

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