Temperature dependence of Raman scattering in Co-doped AlN whiskers

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	Temperature dependence of Raman scattering in Co-doped AlN whiskers
	Jiang, LB ; Li, H ; Zuo, SB ; Bao, HQ ; Wang, WJ ; Chen, XL
刊名	APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
	2010
卷号	100 期号:2 页码:545
关键词	NITRIDE
ISSN号	0947-8396
通讯作者	Chen, XL (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, POB 603, Beijing 100190, Peoples R China.
中文摘要	Raman studies are reported for the A (1) (TO), E (2) (high) and E (1) (LO) phonons of Co-doped AlN whiskers from 78 K to 778 K. The temperature dependence of the Raman shifts and line widths of these phonons can be well described by an empirical model which takes into account the contribution of the thermal expansion of the lattice and the symmetric decay of phonons into two and three identical phonons with lower energy. Our results show that the three-phonon process is the dominant decay channel in A (1) (TO), E (2) (high) and E (1) (LO). The symmetric decay of A (1) (TO) may be attributed to the production of two LA phonons near the M symmetry point of the Brillouin zone. For E (2) (high), the symmetric decay may be near the M and L symmetry points. The E (1) (LO) phonon, whose decay behavior has not been identified in AlN, may decay near the H and K symmetry points of the Brillouin zone. Compared with undoped AlN, the stronger temperature dependence of the A (1) (TO) and E (2) (high) phonons in Co-doped AlN whiskers was observed, which is probably due to the distortion of the lattice and the much larger tensile stress after doping Co into AlN.
收录类别	SCI
资助信息	National Basic Research Program of China [2007CB936300]; National Natural Science Foundation of China [50702073]
语种	英语
公开日期	2013-09-23
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/44765]
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	Jiang, LB,Li, H,Zuo, SB,et al. Temperature dependence of Raman scattering in Co-doped AlN whiskers[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,2010,100(2):545.
APA	Jiang, LB,Li, H,Zuo, SB,Bao, HQ,Wang, WJ,&Chen, XL.(2010).Temperature dependence of Raman scattering in Co-doped AlN whiskers.APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,100(2),545.
MLA	Jiang, LB,et al."Temperature dependence of Raman scattering in Co-doped AlN whiskers".APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING 100.2(2010):545.