Influence of vacuum degree on growth of Bi2Te3 single crystal

doi:10.1088/1674-1056/24/7/078101

中国物理B ›› 2015, Vol. 24 ›› Issue (7): 78101-078101.doi: 10.1088/1674-1056/24/7/078101

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Influence of vacuum degree on growth of Bi₂Te₃ single crystal

唐雁坤, 赵文娟, 朱化强, 黄勇潮, 曹伟伟, 杨倩, 姚晓燕, 翟亚, 董帅

Department of Physics, Southeast University, Nanjing 211189, China

收稿日期:2015-01-25 修回日期:2015-01-29 出版日期:2015-07-05 发布日期:2015-07-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10904013 and 11274060), the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK2009260 and BK20141329), and the Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China.

Influence of vacuum degree on growth of Bi₂Te₃ single crystal

Tang Yan-Kun (唐雁坤), Zhao Wen-Juan (赵文娟), Zhu Hua-Qiang (朱化强), Huang Yong-Chao (黄勇潮), Cao Wei-Wei (曹伟伟), Yang Qian (杨倩), Yao Xiao-Yan (姚晓燕), Zhai Ya (翟亚), Dong Shuai (董帅)

Department of Physics, Southeast University, Nanjing 211189, China

Received:2015-01-25 Revised:2015-01-29 Online:2015-07-05 Published:2015-07-05
Contact: Tang Yan-Kun E-mail:yktang@seu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10904013 and 11274060), the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK2009260 and BK20141329), and the Scientific Research Staring Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China.

摘要/Abstract

摘要：

Bi₂Te₃ single crystals were prepared by the solid-state reaction method. The effect of the vacuum on the growth of Bi₂Te₃ single crystals was studied with varying the oxygen content by controlling the air pressure in the silica tube. High quality Bi₂Te₃ single crystals have been obtained and there is no influence on the growth by an extremely small amount of oxygen in a high vacuum at 1.0 × 10^-3 Pa. As the air pressure is increased at 1.0 × 10^-2 Pa, oxygen only mainly impacts on the growth of the surface for the prepared samples. Micron-sized rod-like structure and flower-like clusters are observed on the surface. For the samples prepared at 1.0 × 10^-1 Pa, x-ray diffraction data show that the yellow part on the surface is Bi₂TeO₅, while the Bi₂Te₃ single crystal is still the major phase as the inside part. More interestingly, various crystal morphologies are observed by scanning electron microscope for Bi₂Te₃ near the boundary between Bi₂Te₃ and Bi₂TeO₅. Possible growth mechanisms for Bi₂Te₃ with different morphologies are discussed in detail.

关键词: single crystal growth, crystal morphology, impurities, bismuth compounds

Abstract:

Key words: single crystal growth, crystal morphology, impurities, bismuth compounds

中图分类号: (Metals, semimetals, and alloys)

81.05.Bx

81.10.Pq (Growth in vacuum) 68.37.Hk (Scanning electron microscopy (SEM) (including EBIC))

唐雁坤, 赵文娟, 朱化强, 黄勇潮, 曹伟伟, 杨倩, 姚晓燕, 翟亚, 董帅. Influence of vacuum degree on growth of Bi₂Te₃ single crystal[J]. 中国物理B, 2015, 24(7): 78101-078101.

Tang Yan-Kun (唐雁坤), Zhao Wen-Juan (赵文娟), Zhu Hua-Qiang (朱化强), Huang Yong-Chao (黄勇潮), Cao Wei-Wei (曹伟伟), Yang Qian (杨倩), Yao Xiao-Yan (姚晓燕), Zhai Ya (翟亚), Dong Shuai (董帅). Influence of vacuum degree on growth of Bi₂Te₃ single crystal[J]. Chin. Phys. B, 2015, 24(7): 78101-078101.

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Influence of vacuum degree on growth of Bi₂Te₃ single crystal

Influence of vacuum degree on growth of Bi₂Te₃ single crystal

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