Hielscher J, Martinsons M, Schmiedeberg M, Kapfer S (2017)
Publication Status: Published
Publication Type: Journal article
Publication year: 2017
Publisher: IOP PUBLISHING LTD
Book Volume: 29
Journal Issue: 9
Phasons are additional degrees of freedom which occur in quasicrystals alongside the phonons known from conventional periodic crystals. The rearrangements of particles that are associated with a phason mode are hard to interpret in physical space. We reconstruct the quasicrystal structure by an embedding into extended higher-dimensional space, where phasons correspond to displacements perpendicular to the physical space. In dislocation-free decagonal colloidal quasicrystals annealed with Brownian dynamics simulations, we identify thermal phonon and phason modes. Finite phononic strain is pinned by phasonic excitations even after cooling down to zero temperature. For the phasonic displacements underlying the flip pattern, the reconstruction method gives an approximation within the limits of a multi-mode harmonic ansatz, and points to fundamental limitations of a harmonic picture for phasonic excitations in intrinsic colloidal quasicrystals.
APA:
Hielscher, J., Martinsons, M., Schmiedeberg, M., & Kapfer, S. (2017). Detection of phonon and phason modes in intrinsic colloidal quasicrystals by reconstructing their structure in hyperspace. Journal of Physics: Condensed Matter, 29(9). https://dx.doi.org/10.1088/1361-648X/aa55a5
MLA:
Hielscher, Johannes, et al. "Detection of phonon and phason modes in intrinsic colloidal quasicrystals by reconstructing their structure in hyperspace." Journal of Physics: Condensed Matter 29.9 (2017).
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