Response of the Mode Grüneisen Parameters With Anisotropic Compression: A Pressure and Temperature Dependent Raman Study of β-Sn

Authors

Jasmine K. Hinton, University of Nevada, Las Vegas
Christian Childs, University of Nevada, Las Vegas
Dean Smith, University of Nevada, Las Vegas
Paul B. Ellison, University of Nevada, Las VegasFollow
Keith V. Lawler, Argonne National Laboratory
Ashkan Salamat, University of Nevada, Las VegasFollow

Document Type

Article

Publication Date

11-23-2020

Publication Title

Physical Review

Volume

102

First page number:

1

Last page number:

10

Abstract

The lattice dynamic response of body-centered tetragonal β−Sn (I41/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 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.

Disciplines

Atomic, Molecular and Optical Physics

File Format

pdf

File Size

2.354 KB

Language

English

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 License.

Repository Citation

Hinton, J. K., Childs, C., Smith, D., Ellison, P. B., Lawler, K. V., Salamat, A. (2020). Response of the Mode Grüneisen Parameters With Anisotropic Compression: A Pressure and Temperature Dependent Raman Study of β-Sn. Physical Review, 102 1-10.
http://dx.doi.org/10.1103/PhysRevB.102.184112