Collective Atomic Flows in Random Tiling Quasicrystals
We show that in terms of phason flips collective motions of atoms in quasicrystalline tilings are possible: atomic flows and large deformations. Approximants or large density fluctuations are associated with the atomic flows that cause plastic deformations. In this scheme no dislocations are needed. We view random tilings as metallic rubbers exhibiting plast-elasticity in analogy with the visco-elasticity of polymeric materials.