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