Ising-Like Transition and Phason Unlocking in Icosahedral Quasicrystals

Tomonari Dotera and Paul J. Steinhardt

Phys. Rev. Lett. 72 (1994), pp.1670-1673

Using Monte Carlo computer simulations, we find strong evidence for a novel, finite-temperature, Ising-like transition in the alignment of unit cells in icosahedral quasicrystals. The Ising-like transition may be related to the transition in phason behavior from a locked (Penrose-tiling-like) phase at low temperatures to an unlocked (random-tiling-like) phase at high temperatures.