The optical conductivity of high quality decagonal quasicrystals of Al₆₅{Co}₁₇Cu₁₈ and Al₆₂{Co}₁₅Cu₂₀{Si}₃$ shows a strong anisotropy between the periodic and the quasiperiodic directions. We suggest that this is due to the dramatic enhancement of scattering in the quasiperiodic planes. The analysis of the conductivity reveals a drastic difference between the electronic structure of the decagonal quasicrystals and the icosahedral quasicrystals.
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Basov et al. (1994) studied this question.
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