Semiconductor - Semimetal Transition in WSe 2 induced by pressure.
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1. Semiconductor - Semimetal Transition in WSe 2 induced by pressure. 2. High pressure structural and luminescence properties of Y 2 O 3 nanotubes. 3. In situ X-ray diffraction study of ReS 2 at High Pressures. 4. The compressibility of the La - Mg - Ni alloy system. 5. Phase transition of nanocrystalline and bulk maghemite (γ- Fe 2 O 3 ) to hematite (α - Fe 2 O 3 ) induced by pressure. 6. The effect of sample insulation on experiment precision of resistivity measurement in a diamond anvil cell. 7. In situ impedance measurements in diamond anvil cell under high pressure. XRD image of ReS2 at 4.4 GPa Anvil Cell Yanzhang Ma, Texas Tech University , DMR 0619215 The SEM image of (a) pure and (b) Eu-doped Y 2 O 3 nanotubes. The XRD patterns of Eu-doped Y 2 O 3 NTs at high pressures. The wavelength (a) and HWFM (b) of the strongest emission of Eu-doped Y 2 O 3 nanotubes. X-ray diffraction patterns of ReS 2 at high pressures. X-ray diffraction of the La-Mg-Ni alloy. a, b, c, d refer to La 2 Mg 16 Ni, LaMg 2 Ni, LaMg 3 , and γ-La phases. Impedance of nanocrystalline ZnS under different pressure. Carrier activation energy as a function of pressure. The inset shows resistivity vs temperature at 35.69 GPa and 42.43 GPa.
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Raman Spectroscopy for High P-T by laser-heated Diamond Anvil Cell Yanzhang Ma, Texas Tech University , DMR 0619215. Semiconductor - Semimetal Transition in WSe 2 induced by pressure. High pressure structural and luminescence properties of Y 2 O 3 nanotubes. - PowerPoint PPT Presentation
Transcript of Semiconductor - Semimetal Transition in WSe 2 induced by pressure.
1. Semiconductor - Semimetal Transition in WSe2 induced by pressure.
2. High pressure structural and luminescence properties of Y2O3 nanotubes.
3. In situ X-ray diffraction study of ReS2
at High Pressures.4. The compressibility of the La - Mg -
Ni alloy system. 5. Phase transition of nanocrystalline
and bulk maghemite (γ- Fe2O3 ) to hematite (α - Fe2O3 ) induced by pressure.
6. The effect of sample insulation on experiment precision of resistivity measurement in a diamond anvil cell.
7. In situ impedance measurements in diamond anvil cell under high pressure.
8. In situ X-ray diffraction study on icosahedral boron arsenide (B12As2) at High Pressures.
XRD image of ReS2 at 4.4 GPa
Raman Spectroscopy for High P-T by laser-heated Diamond Anvil Cell
Yanzhang Ma, Texas Tech University , DMR 0619215
The SEM image of (a) pure and (b) Eu-doped Y2O3 nanotubes.
The XRD patterns of Eu-doped Y2O3 NTs at high pressures.
The wavelength (a) and HWFM (b) of the strongest emission of Eu-doped Y2O3 nanotubes.
X-ray diffraction patterns of ReS2 at high pressures.
X-ray diffraction of the La-Mg-Ni alloy. a, b, c, d refer to La2Mg16Ni, LaMg2Ni, LaMg3, and γ-La phases.
Impedance of nanocrystalline ZnS under different pressure.
Carrier activation energy as a function of pressure. The inset shows resistivity vs temperature at 35.69 GPa and 42.43 GPa.
Lab staff working with students
Raman Spectroscopy for High P-T by laser-heated Diamond Anvil Cell
Yanzhang Ma, Texas Tech University , DMR 0619215
Research, education and collaboration:
1. Radial diffraction experimental research using big diamond compounds anvil (up to 3mm) in rotational diamond anvil cell.
2. Supporting of Post Doctor, Hongyang Zhu
3. Supporting of 3 PhD students: Cheng Ji, Dongbin Hou, and Jianzhe Wu
Visiting Scholar F. Zhang working in HP lab at TTU
Visiting Scholar O. Tschauner
Visiting Scholar F. Zhang working in HP lab at TTU
PhD student D. Hou working in HP lab at TTU
PhD student J. Wu working at CHESS
Visiting ScholarE. Selvi workingat CHESS
RDAC installed in Beamline B2 at CHESS
