Investigation of Crystal Properties of Tlx:Sb2Te3 and Tlx:Sb2Se3
碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 107 === In this study, Tlx:Sb2Te3 was grown by Melting Growth Method and Tlx:Sb2Se3 was grown by Floating Zone Method. The effect of different ratio of Thallium on Tlx:Sb2Te3 and Tlx:Sb2Se3 were investigated. The elemental composition of the sample was analyzed by...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2019
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| Online Access: | http://ndltd.ncl.edu.tw/handle/h5r98b |
| Summary: | 碩士 === 國立中山大學 === 材料與光電科學學系研究所 === 107 === In this study, Tlx:Sb2Te3 was grown by Melting Growth Method and Tlx:Sb2Se3 was grown by
Floating Zone Method. The effect of different ratio of Thallium on Tlx:Sb2Te3 and Tlx:Sb2Se3 were
investigated. The elemental composition of the sample was analyzed by Energy-Dispersive X-ray
Spectroscopy (EDS). The structure and crystallographic direction of the sample were analyzed by X
ray diffraction (XRD). Doping mechanism of thallium atoms were measured by X-ray photoelectron
spectroscopy(XPS). The influence of doping thallium atoms on phonon vibration mode was analyzed
by raman spectrometer. The superconductivity property of the samples were measured by a
Superconducting Quantum Interference Device (SQUID).
The experimental results show that the thallium distribution of Tlx:Sb2Te3 and Tlx:Sb2Se3
series samples are inhomogeneous. The different doping amount of thallium does not influence the
lattice constant. The doping mechanism of thallium is substitution. Different doping amounts of
thallium have no significant effect on phonon vibration mode. The Tlx:Sb2Te3 and Tlx:Sb2Se3 series
samples do not have superconductivity property.
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