Issue |
Europhys. Lett.
Volume 46, Number 6, June II 1999
|
|
---|---|---|
Page(s) | 748 - 754 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i1999-00328-9 | |
Published online | 01 September 2002 |
Phonon-phason coupling in icosahedral quasicrystals
Department of Physics, Cornell University - Ithaca NY 14853-2501, USA
Received:
16
December
1998
Accepted:
15
April
1999
From relaxation simulations of decoration-based quasicrystal structure models using microscopically based interatomic pair potentials, we have calculated the (usually neglected) phonon-phason coupling constant. Its sign is opposite for the two alloys studied, i-AlMn and i-(Al,Cu)Li; a dimensionless measure of its magnitude relative to the phonon and phason elastic constants is of order 1/10, suggesting its effects are small but detectable. We also give a criterion for when phonon-phason effects are noticeable in diffuse tails of Bragg peaks.
PACS: 61.44.Br – Quasicrystals / 62.20.Dc – Elasticity, elastic constants / 61.10.Dp – Theories of X-ray diffraction and scattering (including small-angle scattering)
© EDP Sciences, 1999
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.