Beryllium sites in MBE-grown BeZnO alloy films

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	Beryllium sites in MBE-grown BeZnO alloy films
	Ye, DQ ; Mei, ZX ; Liang, HL ; Liu, YL ; Azarov, A ; Kuznetsov, A ; Du, XL
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2014
卷号	47 期号:17
关键词	BeZnO interstitial phase segregation x-ray photoelectron spectroscopy Raman molecular beam epitaxy time-of-flight elastic recoil detection analysis
ISSN号	0022-3727
通讯作者	Mei, ZX (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Key Lab Renewable Energy, Beijing 100190, Peoples R China.
中文摘要	We report the possible sites that beryllium atoms can occupy in BeZnO alloy films by a comparative study. The epitaxial BexZn1-O-x (x = 0, 0.06, 0.1, 1) films were prepared by a molecular beam epitaxy technique, and their structural properties were characterized with x-ray diffraction, Raman spectroscopy and x-ray photoelectron spectroscopy, while the Be composition, x, was measured with time of flight elastic recoil detection analysis. When x is 6%, substitutional and interstitial Be atoms are revealed to be co-existing in BexZn1-xO films. Furthermore, phase segregation of BeO is observed when x increases to 10% due to the huge difference of the bond length between Be-O and Zn-O. In this case, most of the Be atoms are found to form BeO particles, rather than a BeZnO alloy, so as to reduce the formation energy. The incorporation of Be atoms in the ZnO lattice consequently decreases in Be0.1Zn0.9O, resulting in a smaller bandgap than that of Be0.06Zn0.94O.
资助信息	National Science Foundation [61076007, 11174348, 51272280, 11274366, 61204067]; Ministry of Science and Technology of China [2011CB302002, 2011CB302006]; Chinese Academy of Sciences
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59261]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Ye, DQ,Mei, ZX,Liang, HL,et al. Beryllium sites in MBE-grown BeZnO alloy films[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2014,47(17).
APA	Ye, DQ.,Mei, ZX.,Liang, HL.,Liu, YL.,Azarov, A.,...&Du, XL.(2014).Beryllium sites in MBE-grown BeZnO alloy films.JOURNAL OF PHYSICS D-APPLIED PHYSICS,47(17).
MLA	Ye, DQ,et al."Beryllium sites in MBE-grown BeZnO alloy films".JOURNAL OF PHYSICS D-APPLIED PHYSICS 47.17(2014).