High-pressure Raman study of osmium and rhenium up to 200 GPa and pressure dependent elastic shear modulus C44 |
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Institution: | Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China |
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Abstract: | High-pressure Raman scattering from hexagonal close-packed (HCP) metals Os and Re have been extended up to 200 GPa, and the pressure-dependent shear modulus C44 has been deduced from the Raman-active mode E2g, which is generated from the adjacent vibration of atoms in hexagonal planes, providing the valuable information about the elastic properties for HCP metals under high pressure. Combined with the available data of HCP metals from previous works, a further study indicates that the $C_{44}^\prime/C_{44}$ ratio would be close to a constant value, 0.01, with increasing atomic number of metals. The results obtained from high-pressure Raman scattering will allow us to probe the elastic anisotropy of the HCP metals at very high pressure. |
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Keywords: | hexagonal close-packed (HCP) metals osmium rhenium high-pressure Raman scattering shear modulus C44 |
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