Inelastic neutron scattering study of the lattice dynamics and anharmonicity of thermoelectric cubic SrSi2
We wish to study the lattice dynamics and phonon anharmonicity of cubic SrSi2 by inelastic neutron scattering. Cubic SrSi2 has been predicted to be a topological Weyl semimetal and to have quadratic double-Weyl phonons and is an excellent thermoelectric material with ZT up to 0.4 at 300 K. This is notably because it has a low thermal conductivity for a silicide compound. Our calculations indicate the presence of a low-energy optical mode with a rather high Grüneisen parameter which can be probed only with neutron spectroscopy because it is optically silent. As it will give a significant peak in the phonon DOS, inelastic neutron scattering experiments using a time of flight spectrometer will be a good choice in order to probe its anharmonicity and to understand its connection with the low thermal conductivity of cubic SrSi2. We, therefore, ask for temperature-and pressure-dependent inelastic experiments to study the vibrational properties responsible for thermal transport in cubic SrSi2 in every detail.
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The recommended format for citing this dataset in a research publication is in the following format:
ALI Doaa; BEAUDHUIN Mickael; GHANNAM Rana; KOZA Michael Marek and VIENNOIS Romain. (2023). Inelastic neutron scattering study of the lattice dynamics and anharmonicity of thermoelectric cubic SrSi2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-578
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