Stacking fault excitons in AgBr microcrystals with twin planes
作者:
A. Marchetti,
期刊:
Radiation Effects and Defects in Solids
(Taylor Available online 1995)
卷期:
Volume 137,
issue 1-4
页码: 77-80
ISSN:1042-0150
年代: 1995
DOI:10.1080/10420159508222697
出版商: Taylor & Francis Group
关键词: AgBr;Stacking Fault;Exciton;Twin Plane;Low temperature Spectra
数据来源: Taylor
摘要:
The visible emission and excitation spectra of AgBr microcrystals containing single and parallel double twin planes has been obtained. A band at 462.28 nm (2.6813 eV) is observed in the excitation spectrum. This feature is about 2.5 meV below the indirect exciton band edge. Coincident emission features are observed. The band in the excitation spectrum of microcrystals with two parallel twin planes is often split into a doublet with splittings between 1 and 2 meV. The new band is assigned to an exciton created at a stacking fault and the splittings are thought to be due to tunnelling of the exciton between proximate twin planes.
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