Title page for etd-0626117-170333


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URN etd-0626117-170333
Author Xiang-Ze Zheng
Author's Email Address kingonlysj@gmail.com
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Department Materials and Optoelectronic Science
Year 2016
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Synthesis of Topological Superconductor Single Crystal
Cux: Bi2Se3 by Hydrothermal Method
Date of Defense 2017-07-19
Page Count 78
Keyword
  • topological superconductor
  • CuxBi2Se3
  • hydrothermal method
  • topological insulator
  • Bi2Se3
  • Abstract CuXBi2Se3 is one of the most widely studied topological superconductors(TSC) and the intercalation of Cu for superconductivity is quite important. In this thesis, the hydrothermal synthesis was studied and desired to dope Cu atoms into the van der Waals layers of topological insulator Bi2Se3. Bi2Se3 single crystal was pre-grown by melt growth and then devided into flakes along the cleavage plane. Cu atoms could be intercalated into the layered structure of Bi2Se3 through the high temperature and high pressure environment and the superconductivity behavior was successfully induced by hydrothermal synthesis.
    The c-axis lattice constant and lattice structure of the samples were confirmed by XRD and TEM. The vibration mode of phonons was obtained by Raman spectrum. Qualitative and quantitative analysis were observed by EDS. The valence of the Cu was certified by XPS. Superconducting quantum interference device (SQUID) was used to verify the superconducting magnetization and the superconducting transition temperature Tc is about 3.5 K.
    Advisory Committee
  • Shi-Hsin Lin - chair
  • Chao-Kuei Lee - co-chair
  • Shiu-Ming Huang - co-chair
  • Mitch M.C. Chou - advisor
  • Files
  • etd-0626117-170333.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2017-07-31

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