Electronic structure and stability of a model of the decagonal quasicrystal Al-Cu-Co

摘要: We present an electronic structure study of a model the decagonal quasicrystal Al-Cu-Co, proposed by one us (SEE). Both quasicrystalline clusters and their crystalline counterparts are examined. The locations ratio concentrations Cu Co atoms in found to be important determining shape magnitude density states at Fermi level. A local minimum (DOS) level is exhibited only with concentration larger than Co. However, such do not have lowest internal (band) energy. No DOS obtained for equal or nearly concentrations. Spectral functions reveal no evidence pseudogap originating from Fermi-surface-Jones-zone-boundary interaction. Eigenstates appear localized within used our calculations.