Electronic transport measurements are summarised on two insulating icosahedral quasicrystalline (IQC) Al69.0Pd22.8 Re8.2 samples. Data were taken between 0.020 K ≤ T ≤ 292 K and in magnetic fields Bs up to 18T. For a weakly insulating IQC, the electronic conductivity followed the expression: σ(T) = σ0Tzexp(T/T0) over four decades of temperature. For a strongly insulating sample, the conductivity above 0.3 K followed simple temperature power laws, σ(T) = σ0Tz. Below 0.2 K, the conductivity displayed an activated variable-range hopping (VRH) law. These fits included a conductivity contribution arising from the presence of a second metallic phase, which caused "weak saturation" of the measured resistances below 1 K.
- VRH activated conductivity