Response of the mode Grüneisen parameters with anisotropic compression: A pressure and temperature dependent Raman study of -Sn
The lattice dynamic response of body-centered tetragonal β-Sn (I 4 1/amd) under high-
pressure and-temperature conditions is determined using experimental optical vibration
modes. Raman scattering is used to map the phase stability region of β-Sn to perform mode
Grüneisen analysis, and we demonstrate the necessity of an optical intensity calibration for
Raman thermometry. The Grüneisen tensor is evaluated along a set of isotherms to address
shortcomings of single-mode Grüneisen parameters with respect to anisotropic deformations …
pressure and-temperature conditions is determined using experimental optical vibration
modes. Raman scattering is used to map the phase stability region of β-Sn to perform mode
Grüneisen analysis, and we demonstrate the necessity of an optical intensity calibration for
Raman thermometry. The Grüneisen tensor is evaluated along a set of isotherms to address
shortcomings of single-mode Grüneisen parameters with respect to anisotropic deformations …
The lattice dynamic response of body-centered tetragonal under high-pressure and -temperature conditions is determined using experimental optical vibration modes. Raman scattering is used to map the phase stability region of to perform mode Grüneisen analysis, and we demonstrate the necessity of an optical intensity calibration for Raman thermometry. The Grüneisen tensor is evaluated along a set of isotherms to address shortcomings of single-mode Grüneisen parameters with respect to anisotropic deformations of this tetragonal structured soft metal. The changes observed here in the Grüneisen tensor as a function of temperature are related to anharmonicity and denote potential criteria for the onset of premelting.
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