Impact of structural complexity and disorder on lattice dynamics and thermal conductivity in the o- Al13Co4 phase
| Autor: | M. de Boissieu, Mark R. Johnson, L. P. Regnault, Stéphane Pailhès, Marek Mihalkovic, P.-F. Lory, Vincent Giordano, P. Bastie, Helmut Schober, Yu. Grin, Holger Euchner, E. Pellegrini, Peter Gille, Miguel A. Gonzalez |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed matter physics Phonon Scattering Quasicrystal 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic units Molecular dynamics Thermal conductivity Phase (matter) 0103 physical sciences 010306 general physics 0210 nano-technology Pair potential |
| Zdroj: | Physical Review B. 102 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.102.024303 |
| Popis: | Combining inelastic neutron and x-ray scattering with atomic scale simulation, we report on a comprehensive study of the lattice dynamics and its relationship with the low thermal conductivity of the o-${\mathrm{Al}}_{13}{\mathrm{Co}}_{4}$ phase, a periodic approximant (about 100 atoms per cell) to a decagonal quasicrystal. The obtained experimental data, phonon lifetimes, and temperature-independent lattice thermal conductivity can only be fully described by molecular dynamics simulations, using oscillating pair potential, when the disorder of 12 Al sites is properly taken into account. Our results pave the way for a detailed understanding of materials where structural complexity and local disorder are at play. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|