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MgZnO/MgO strained multiple-quantum-well nanocolumnar films: Stress-induced structural transition and deep ultraviolet emission
Wang, L; Xu, HY; Zhang, C; Li, XH; Liu, YC; Zhang, XT; Tao, Y; Huang, Y; Chen, DL;陶冶; Huang Y(黄艳); Chen DL(陈栋梁)
2012
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
Volume513Pages:399-403
AbstractMgZnO/MgO strained multiple-quantum-wells (S-MQWs) with different structures are grown by pulsed laser deposition. The S-MQW films are composed of closely arranged, vertically oriented nanocolumns. Z-contrast scanning transmission electron microscopy observations and line-scan compositional analysis reveal that the nanocolumns are compositionally modulated along their length and have a MQW structure. A coherent epitaxial relationship with a sharp interface is established between MgZnO and MgO layers with large lattice mismatch. It is worth noting that the MgZnO layer undergoes a structural transition from hexagonal to cubic phase with its thickness decreasing. The calculations reveal that a large in-plane compressive stress dominates such an interesting phase transition process, stabilizes the low Mg-content MgZnO alloy in the anomalous cubic phase, and also leads to a broadening of the band gap. As a result, the wavelength-tunable deep-ultraviolet emission in the range of 261-314 nm is obtained from these S-MQW nanocolumnar films. The 261 nm is known to be the shortest emission wavelength ever reported for MgZnO material. (C) 2011 Elsevier B. V. All rights reserved.
KeywordMgZnO/MgO Multiple-quantum-well Nanocolumn Structural transition Deep ultraviolet
Subject AreaChemistry; Materials Science; Metallurgy & Metallurgical Engineering
DOI10.1016/j.jallcom.2011.10.056
Indexed BySCI
WOS IDWOS:000298156400071
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/223970
Collection多学科研究中心
Recommended Citation
GB/T 7714
Wang, L,Xu, HY,Zhang, C,et al. MgZnO/MgO strained multiple-quantum-well nanocolumnar films: Stress-induced structural transition and deep ultraviolet emission[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2012,513:399-403.
APA Wang, L.,Xu, HY.,Zhang, C.,Li, XH.,Liu, YC.,...&陈栋梁.(2012).MgZnO/MgO strained multiple-quantum-well nanocolumnar films: Stress-induced structural transition and deep ultraviolet emission.JOURNAL OF ALLOYS AND COMPOUNDS,513,399-403.
MLA Wang, L,et al."MgZnO/MgO strained multiple-quantum-well nanocolumnar films: Stress-induced structural transition and deep ultraviolet emission".JOURNAL OF ALLOYS AND COMPOUNDS 513(2012):399-403.
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