Stabilized high-temperature hexagonal phase in copper halide nanocrystals

被引：0

作者：

I. Kh. Akopyan

V. A. Gaisin

D. K. Loginov

B. V. Novikov

A. Tsagan-Manzhiev

M. I. Vasil’ev

V. V. Golubkov

机构：

[1] St. Petersburg State University,Fock Institute of Physics

[2] Russian Academy of Sciences,Institute of Silicate Chemistry

来源：

Physics of the Solid State | 2005年 / 47卷

关键词：

Copper; Spectroscopy; State Physics; Absorption Spectrum; Absorption Band;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Low-temperature (T = 4.2–77 K) absorption spectra of CuCl and CuBr nanocrystals in photochromic glass matrixes are studied. A fine structure of exciton absorption bands (Z3 band for CuCl and Z12 band for CuBr) is discovered and studied as a function of nanocrystal size. It is suggested that the high-energy part of the absorption band is due to the high-temperature hexagonal β phase being stabilized in very small samples; a transition to the stable cubic phase with increasing nanocrystal size is demonstrated.

引用

页码：1372 / 1375

页数：3

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