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Issue		Eur. Phys. J. B Volume 6, Number 4, December II 1998
Page(s)		425 - 445
DOI		10.1007/s100510050570

Eur. Phys. J. B 6, 425-445

Atomic self-diffusion in dodecagonal quasicrystals

J. Roth¹ - F. Gähler^1,2

¹ Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany
² Centre de Physique Théorique, École Polytechnique, 91128 Palaiseau, France

Received: 11 March 1998 / Received in final form and Accepted: 30 July 1998

Abstract
A molecular dynamics study of atomic self-diffusion in Frank-Kasper type dodecagonal quasicrystals is presented. It is found that the quasicrystal-specific flip mechanism for atomic diffusion, predicted by Kalugin and Katz, indeed occurs in this system. However, in order to be effective, this mechanism needs to be catalyzed by other defects, such as half-vacancies. For this reason, it is difficult to distinguish from standard vacancy diffusion.

PACS
61.44.Br Quasicrystals - 66.30.-h Diffusion in solids - 61.72.Ji Point defects (vacancies, interstitials, color center, etc.) and defect clusters

Author for correspondance: johannes@itap.physik.uni-stuttgart.de, gaehler@itap.physik.uni-stuttgart.de

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