ࡱ> 473ybjbjB${{eeeeeyyyyD y0$m$!e$eeEvvveevvvvG)iW> v[0vCH.Cvv8Ce<v$$vC% +:THermoelectric Properties of Quasicrystals Petar Pop evi1, Kristijan Velebit1, Denis Stani2,1, Jovica Ivkov1, }eljko Bihar3,1, Ante Biluai4,1, Ana Smontara1 1Institut za fiziku, Bijeni ka 46, HR-10000 Zagreb, Croatia 2Department of Physics, University of Osijek, HR-31000 Osijek, Croatia 3Faculty of Textile Technology, University of Zagreb, HR-10000 Zagreb, Croatia 4Department of Physics Faculty of Science, University of Split, HR-21000 Split, Croatia Corresponding author: bilusic@pmfst.hr Quasicrystals are materials that fascinate scientists for more than thirty years: discovery of such materials that possess long-range translational and non-crystalographic orientational order eventually led to re-definition of the term crystal. The peculiar structure is not the only physical property that makes quasicrystals so interesting: from the point of view of transport, they closely match the concept that a good thermoelectric should have: a glasslike material in relation to phonon, and a metal in relation to electronic transport. Generally, quasicrystals are intrinsically poor thermal conductors the lack of long-range periodicity disturbs phonon- (and consequently the heat-) flow considerably. Contrary, the charge transport is tunable by difference in compositional, impurity and sample-preparation properties, giving the opportunity to optimize their thermoelectric figure of merit. In this work we discuss charge and heat transport properties of aluminum-based quasicrystals and compare them with related materials being quasiperiodic at short- and periodic at long-range scale, known as quasicrystal approximants. The charge transport (electrical conductivity and thermoelectric power) is analyzed within the spectral conductivity model. The measured thermal conductivity data are analyzed and discussed by the model that takes into account modification of the Wiedemann-Franz law typical for the quasicrystalline structure, and contributions of both extended and localized lattice vibrations. 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