Phonon dispersion curves in Cr2AlC single-crystals

A. Champagne; F. Bourdarot; P. Bourges; P. Piekarz; D. Pinek; I. Gélard; J.-C. Charlier; T. Ouisse

doi:10.1080/21663831.2018.1463298

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Phonon dispersion curves in Cr2AlC single-crystals

Original Report | 更新时间：2026-08-19

- Phonon dispersion curves in Cr2AlC single-crystals
- Materials Research Letters Vol. 6, Issue 7, Pages: 378-383(2018)
- 作者机构：
  
  1. Institute of Condensed Matter and Nanosciences Université catholique de Louvain
  2. Service de Modélisation et d’Exploration des Matériaux Université Grenoble Alpes et Commissariat à l’Energie Atomique INAC
  3. Laboratoire Léon Brillouin CEA-CNRS Université Paris-Saclay CEA Saclay
  4. Institute of Nuclear Physics Polish Academy of Sciences
  5. Université Grenoble-Alpes CNRS Grenoble INP LMGP
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2018.1463298
  CLC：
- Online First：13 April 2018，
  
  Published：2018
- 稿件说明：
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A. Champagne, F. Bourdarot, P. Bourges, et al. Phonon dispersion curves in Cr2AlC single-crystals[J]. Materials Research Letters, 2018, 6(7): 378-383.
DOI：

A. Champagne, F. Bourdarot, P. Bourges, et al. Phonon dispersion curves in Cr2AlC single-crystals[J]. Materials Research Letters, 2018, 6(7): 378-383. DOI： 10.1080/21663831.2018.1463298.

摘要

Abstract

BSTRACTNeutron inelastic scattering is used for the first time to measure phonon dispersion branches in Cr

AlC 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.

IMPACT STATEMENT

We synthesized Cr

AlC single-crystalline platelets with areas over 10 cm

. This breakthrough in materials synthesis was a prerequisite for measuring inelastic neutron scattering and phonon anisotropies.

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