Electronic localization in disordered systems

摘要: A brief review is given of the current understanding electronic structure, transport properties and nature states in disordered systems. simple explanation for observed exponential behaviour density (Urbach tails) based on short-range Gaussian fluctuations presented. The theory Anderson localization a system reviewed. Basic concepts, physics underlying effects weak localization, are discussed. scaling as well self-consistent briefly It then argued that problem random potential within so-called ladder approximation formally equivalent to finding bound state shallow well. Therefore all exponentially localized dD 1 anddD 2. fractal also Scaling highly anisotropic systems presentation recently metal-to-insulator transition 2 and, finally, few remarks about interaction