ISOELECTRONIC TRAP IODINE IN AGBR

被引:63
作者
CZAJA, W [1 ]
BALDERESCHI, A [1 ]
机构
[1] LABS RCA LTD,CH-8084 ZURICH,SWITZERLAND
来源
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS | 1979年 / 12卷 / 02期
关键词
D O I
10.1088/0022-3719/12/2/026
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Iodine in AgBr behaves as an isoelectronic trap with the hole being bound first. The bound-exciton zero-phonon photoluminescence line is split by exchange into an A-line and a B-line separated by 0.1 meV. The Zeeman splitting at H=80 kG is isotropic in agreement with iodine being a substitutional point-like impurity in AgBr. In the low-temperature limit optic and acoustic phonons contribute to the phonon side wing with nearly the same coupling strength. At temperatures below 10K, up to n=11 phonons are observed in the phonon side band. The authors present experimental evidence that these are due to the emission of n optic phonons which, for n>3, are statistically independent. A multiphonon model which neglects the k dependence of transition rates is introduced; however, the model is useful only qualitatively.
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页码:405 / 424
页数:20
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