Electronic characterization of quasicrystalline surface transformations

When ion bombarded at room temperature, the surface of the icosahedral quasicrystal Al70Pd20Mn10 converts to a cubic structure. Bombarded at elevated temperatures, the surface remains quasicrystalline but converts to a tenfold-symmetric structure. In this paper, we search for a change in the electronic properties as the structure is modified and argue a case against the Hume-Rothery rule for these alloys.