Zero-phonon emission and magnetic polaron parameters in EuTe

被引:15
|
作者
Henriques, A. B. [1 ]
Galgano, G. D. [1 ]
Abramof, E. [2 ]
Diaz, B. [2 ]
Rappl, P. H. O. [2 ]
机构
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
[2] LAS INPE, BR-12227010 Sao Jose Dos Campos, Brazil
基金
巴西圣保罗研究基金会;
关键词
SEMICONDUCTORS; CHALCOGENIDES;
D O I
10.1063/1.3634030
中图分类号
O59 [应用物理学];
学科分类号
摘要
A phonon structure in the photoluminescence of EuTe was discovered, with a well-defined zero-phonon emission line (ZPL). The ZPL redshifts linearly with the intensity of applied magnetic field, indicating spin relaxation of the photoexcited electron, and saturates at a lower magnetic field than the optical absorption bandgap, which is attributed to formation of magnetic polarons. From the difference in these saturation fields, the zero-field polaron binding energy and radius are estimated to be 43 meV and 3.2 (in units of the EuTe lattice parameter), respectively. (C) 2011 American Institute of Physics. [doi:10.1063/1.3634030]
引用
收藏
页数:3
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