Measurement of vibrational spectra in high-thermal-conductivity ceramics

DOI

In high-voltage electronics, heat dissipation is a major challenge. Ideally the materials in these devices will have a high thermal conductivity; a property determined by vibrations in the material. In order to improve understanding of these materials and develop better alternatives, it is helpful to have a good theoretical model of these vibrations: available approaches include force-fields, tight-binding and density-functional theory. These simulations may be compared to and calibrated against spectra from Raman measurements and inelastic neutron scattering. We propose temperature-dependent measurements of the vibrational spectra of SiC (an established material) and Ga2O3 (an emerging material) using TOSCA, in order to verify and improve simulations of the dynamics in these systems. This is linked to development of the Abins software used for simulating TOSCA spectra.

Identifier
DOI https://doi.org/10.5286/ISIS.E.RB2010453-2
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/109979175
Provenance
Creator Dr Sanghamitra Mukhopadhyay; Dr Adam Jackson
Publisher ISIS Neutron and Muon Source
Publication Year 2023
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Natural Sciences; Physics
Temporal Coverage Begin 2020-02-17T10:46:12Z
Temporal Coverage End 2020-03-19T09:00:00Z