High-pressure X-ray diffraction study of tungsten diselenide |
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Authors: | Emre Selvi |
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Affiliation: | Department of Mechanical Engineering, Texas Tech University, 7th Street & Boston Avenue, Lubbock, TX 79409, USA |
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Abstract: | Synchrotron X-ray diffraction was used in conjunction with a diamond anvil cell to investigate the properties of a tungsten diselenide (WSe2) sample to 35.8 GPa at room temperature. By fitting the pressure-volume data to the third-order Birch-Murnaghan equation of state, the bulk modulus, K0T, of WSe2 was determined to be 72±1 GPa with its pressure derivative, , being 4.1±0.1. It was also found that the c-direction of the hexagonal structure is significantly more compressible than the a-direction. No phase transformation was clearly observed in the pressure range of our measurements. |
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Keywords: | C. High pressure C. X-ray diffraction D. Equation-of-state |
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