Structural and optical properties of Er-doped AlN

被引:11
作者
Tai, Zhiwei [1 ,2 ]
Yang, Chengtao [1 ,2 ]
Hu, Xianwei [1 ,2 ]
Xie, Yiwei [1 ,2 ]
机构
[1] UESTC, Chengdu, Sichuan, Peoples R China
[2] State Key Lab Elect Thin Films & Integrated Devic, Chengdu, Sichuan, Peoples R China
关键词
Er-doped AlN; first-principles; structural; electronic and optical properties; BAND PARAMETERS; GALLIUM NITRIDE; APPROXIMATION;
D O I
10.1080/10584587.2018.1521664
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Based on first-principles calculations, we have studied the crystal, electronic structure and optical properties in both wurtzite and zinc blend structure of AlN doped with rare-earth element Er. The calculations indicate that the lattice parameters increase after doping showing the distortion of the crystal structure and its density of states is obviously asymmetric indicating the sample is magnetism. The static dielectric constant epsilon(1)(0) of doped systems are increasing compare with pure AlN and the value of zinc blend structure Al0.75Er0.25N is biggest than that of other structures. Dielectric imaginary part epsilon(2)() and absorption coefficient I() both show red shift and the absorption enhance in visible region after doping.
引用
收藏
页码:154 / 163
页数:10
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