標題: Raman study of alloy potential fluctuations in MgxZn1-xO nanopowders
作者: Pan, Ching-Ju
Lin, Kuo-Feng
Hsu, Wei-Tse
Hsieh, Wen-Feng
光電工程學系
Department of Photonics
公開日期: 9-五月-2007
摘要: The blueshift of near-band-edge emission and excitonic absorption indicate that Zn2+ ions are successfully substituted by Mg2+ ions in MgxZn1-xO nanopowders for 0 <= x <= 0.14. The changes in Raman spectral linewidth and the asymmetry of the E-2 ( high) mode for various Mg contents can be well described by a modified spatial correlation model that considers the grain size distribution. With increasing Mg concentration, the alloy potential fluctuations lead to a decrease in the grain size, which is induced by the surplus Mg2+ that could form MgO clusters surrounding the crystalline MgZnO.
URI: http://dx.doi.org/10.1088/0953-8984/19/18/186201
http://hdl.handle.net/11536/10804
ISSN: 0953-8984
DOI: 10.1088/0953-8984/19/18/186201
期刊: JOURNAL OF PHYSICS-CONDENSED MATTER
Volume: 19
Issue: 18
結束頁: 
顯示於類別:期刊論文


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