The electronic relaxation time and transport properties of quasicrystals
Burkov S.E., Varlamov A.A., Livanov D.V.
The novel model for electronic transport in quasicrystals is proposed. Assuming that the multi-valley fractional Fermi-surface exists in the icosahedral phases, the electronic relaxation time due to scattering by structural and phase disorder and quasilattice vibrations is calculated. Then we evaluate some kinetic characteristics like electrical conductivity and thermopower in a wide temperature range on the base of fractional Fermi surface model. The calculated transport properties reveal the main experimentally observed features of quasicrystals like low density of states on Fermi level, low electrical conductivity at ssero temperature and its square-root temperature dependence at low temperatures, large absolute value and strong temperature dependence of thermopower.