THE NEW ALPDRE ICOSAHEDRAL PHASE - TOWARDS UNIVERSAL ELECTRONIC BEHAVIOR FOR QUASI-CRYSTALS

Electronic properties have been measured for different new composition s close to Al70.5Pd22Re7.5 of the icosahedral phase. They exhibit the same exceptional behaviours that were previously found for other stabl e quasicrystalline phases exept for the resistivity magnitude which is much higher that what is observed for the parent AlPdMn icosahedral p hase. For high quality quasicrystals, the conductivity reaches the sam e order of magnitude as the one for doped semiconductors. The conducti vity sigma(T) increases rapidly with temperature. Sigma(T) curves appe ar to be parallel for all i-AlPdRe samples, although conductivity valu es strongly varies with the composition and the structural quality. Hi gh field magnetoconductivity indicates the presence of quantum interfe rence effects including strong electron-electron interactions. All the se features strengthen the concept of universal electronic behaviour f or these complex phases, with particularly enhanced anomalous behaviou r for i-AlPdRe.