High-Pressure X-ray Diffraction Study of Tungsten Diselenide

Journal Article · Mon Dec 31 23:00:00 EST 2007 · Journal of Physics and Chemistry of Solids

DOI:https://doi.org/10.1016/j.jpcs.2008.04.003· OSTI ID:959907

Selvi, E; Aksoy, R; Knudson, R; Ma, Y

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, K{prime}{sub 0T}, 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.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 959907
• Report Number(s): BNL--82893-2009-JA
• Journal Information: Journal of Physics and Chemistry of Solids, Journal Name: Journal of Physics and Chemistry of Solids Journal Issue: 9 Vol. 69; ISSN 0022-3697; ISSN JPCSAW
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
DIAMONDS
PHASE TRANSFORMATIONS
PRESSURE RANGE
SYNCHROTRONS
TUNGSTEN
TUNGSTEN SELENIDES
X-RAY DIFFRACTION
national synchrotron light source