Magnetoconductance of quasicrystals and their approximants: A study of quantum interference effects

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Abstract
The magnetoconductance Δσ(B) of a series of high-quality quasicrystals and approximants is discussed in terms of quantum interference effects. The Δσ(B) data cover a wide temperature range from 0.1 to 200 K and magnetic fields as high as 20 T. Strong electron interactions are found, through inelastic electron-electron scattering as the main inelastic-electron-scattering mechanism and an enhanced electron screening. Evidence for a suppression of the quantum interference effects close to the metal-insulator transition in quasicrystals are discussed.