Chin. Phys. Lett.  2012, Vol. 29 Issue (6): 066801    DOI: 10.1088/0256-307X/29/6/066801
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
The Structural Modification of LiTaO3 Crystal Induced by 100-keV H-ion Implantation
PANG Li-Long1,2, WANG Zhi-Guang1**, YAO Cun-Feng1, ZANG Hang3, LI Yuan-Fei1,2, SUN Jian-Rong1, SHEN Tie-Long1,2, WEI Kong-Fang1, ZHU Ya-Bin1,2, SHENG Yan-Bin1, CUI Ming-Huan1,2, JIN Yun-Fan1
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
2Graduate University of Chinese Academy of Sciences, Beijing 100049
3Xi'an Jiaotong University, Xi'an 710049
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PANG Li-Long, WANG Zhi-Guang, YAO Cun-Feng et al  2012 Chin. Phys. Lett. 29 066801
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Abstract The effects of 100 keV H-ion implantation on the structure of LiTaO3 crystal are investigated by Raman and UV/VIS/NIR spectroscopies. The implantation fluence is in the range from 1.0×1013 to 1.0×1017 H+/cm2. The experimental results show the dependence of the crystal structure on ion fluence. It is found that the structural modification of the LiTaO3 crystal is due to two processes. One is H?ions occupying lithium vacancies (VLi), which is predominant at a fluence less than 1.0×1014 H+/cm2. This process causes the reduction of negative charge centers in the crystal and relaxation of distortion in the local lattice structure. The other is the influence of defects created during implantation, which plays a dominant role gradually in the structural modification at a fluence larger than 1.0×1015 H+/cm2.
Keywords: 68.55.Ln      42.70.-a      78.40.-q     
Received: 14 March 2012      Published: 31 May 2012
PACS:  68.55.Ln (Defects and impurities: doping, implantation, distribution, concentration, etc.)  
  42.70.-a (Optical materials)  
  78.40.-q (Absorption and reflection spectra: visible and ultraviolet)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/6/066801       OR      https://cpl.iphy.ac.cn/Y2012/V29/I6/066801
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PANG Li-Long
WANG Zhi-Guang
YAO Cun-Feng
ZANG Hang
LI Yuan-Fei
SUN Jian-Rong
SHEN Tie-Long
WEI Kong-Fang
ZHU Ya-Bin
SHENG Yan-Bin
CUI Ming-Huan
JIN Yun-Fan
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