Response of the mode Gr\"uneisen parameters with anisotropic compression: A pressure and temperature dependent Raman study of $\ensuremath{\beta}$-Sn

Response of the mode Grüneisen parameters with anisotropic compression: A pressure and temperature dependent Raman study of $β$ -Sn

Jasmine K. Hinton, Christian Childs, Dean Smith, Paul B. Ellison, Keith V. Lawler, and Ashkan Salamat

Phys. Rev. B 102, 184112 – Published 23 November 2020

Abstract

The lattice dynamic response of body-centered tetragonal $β − Sn$ $(I 4_{1} / a m d)$ 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.

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Received 28 August 2020
Revised 26 September 2020
Accepted 2 November 2020

DOI:https://doi.org/10.1103/PhysRevB.102.184112

Physics Subject Headings (PhySH)

Lattice dynamics Phase diagrams Phase transitions Phonons

Meta-GGA Raman spectroscopy

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Jasmine K. Hinton ¹, Christian Childs^1,2, Dean Smith ^1,3, Paul B. Ellison ¹, Keith V. Lawler ⁴, and Ashkan Salamat ^1,*

¹Department of Physics and Astronomy, University of Nevada, Las Vegas, Nevada 89154, USA
²Physical Life Sciences Directorate, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA
³HPCAT, X-Ray Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
⁴Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, Nevada 89154, USA

^*salamat@physics.unlv.edu

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Vol. 102, Iss. 18 — 1 November 2020

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Physical Review B

covering condensed matter and materials physics

Response of the mode Grüneisen parameters with anisotropic compression: A pressure and temperature dependent Raman study of $β$ -Sn

Jasmine K. Hinton, Christian Childs, Dean Smith, Paul B. Ellison, Keith V. Lawler, and Ashkan Salamat

Phys. Rev. B 102, 184112 – Published 23 November 2020

Abstract

Physics Subject Headings (PhySH)

Authors & Affiliations

Article Text (Subscription Required)

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Physical Review B

covering condensed matter and materials physics

Response of the mode Grüneisen parameters with anisotropic compression: A pressure and temperature dependent Raman study of β-Sn

Jasmine K. Hinton, Christian Childs, Dean Smith, Paul B. Ellison, Keith V. Lawler, and Ashkan Salamat

Phys. Rev. B 102, 184112 – Published 23 November 2020

Abstract

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Response of the mode Grüneisen parameters with anisotropic compression: A pressure and temperature dependent Raman study of $β$ -Sn