Computer studies of a phase transition of icosahedral quasicrystals

Tomonari Dotera

Materials Science and Engineering, A181/A182 (1994), pp.758-761

(RQ8: Eighth International conference on Rapid Quench and Metastable Materials, 1993 Aug.)

Abstract

In this paper, we present results of Monte Carlo simulations of icosahedral quasicrystals, which investigate the structural change from a Penrose-like phase to a random tiling phase. We demonstrate a finite temperature transition (kBTc= 1 .52+-0.05 in units of mismatch energies), which implies that equilibrium quasicrystalline materials can be energetically stabilized at finite temperature and can undergo a transition to a random tiling phase at high temperature. The structural change characterized by "sheet" statistics and "sheet magnetization" is illustrated. Dynamic phasons are locked below Tc.