Phonon dispersion curves in Cr2AlC single-crystals

Champagne, Aurélie;Bourdarot, F.;Bourges, P.;Piekarz, P.;Ouisse, T.;et.al.
(2018) Materials Research Letters — Vol. 6, n° 7, p. 378-383 (2018)

Files

champagne2018a.pdf
  • Open Access
  • Adobe PDF
  • 1.5 MB
Download

Details

Authors
  • Champagne, AurélieUCLouvain
    Author
  • Bourdarot, F.Service de Modélisation et d’Exploration des Matériaux, Université Grenoble Alpes et Commissariat à l’Energie Atomique, INAC, Grenoble, France
    Author
  • Bourges, P.Laboratoire Léon Brillouin, CEA-CNRS, Université Paris-Saclay, CEA Saclay, Gif-sur-Yvette, France
    Author
  • Piekarz, P.Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland
    Author
  • Charlier, Jean-Christopheorcid-logoUCLouvain
    Author
  • Ouisse, T.Université Grenoble-Alpes, CNRS, Grenoble INP, LMGP, Grenoble, France
    Author
Show more
Abstract
Neutron inelastic scattering is used for the first time to measure phonon dispersion branches in Cr2AlC MAX phase single crystals with appreciable size. Phonon spectra are also calculated within the Density Functional Perturbation Theory (DFPT) framework and exhibit a very good match with experimental data, including high energy carbon-related optical branches. Both experiments and ab initio simulations confirm the existence of a substantial phonon gap and discard the presence of any softening mode or possible magnetic effect.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Champagne, A., Bourdarot, F., Bourges, P., Piekarz, P., Pinek, D., Gélard, I., Charlier, J.-C., & Ouisse, T. (2018). Phonon dispersion curves in Cr2AlC single-crystals. Materials Research Letters, 6(7), 378-383. https://doi.org/10.1080/21663831.2018.1463298 (Original work published 2018)