Quantum percolation in granular metals
Feigel'man, M. V. · Ioselevich, A. S. · Skvortsov, M. A.
Original · EN
Theory of quantum corrections to conductivity of granular metal films is developed for the realistic case of large randomly distributed tunnel conductances. Quantum fluctuations of intergrain voltages (at energies E much below bare charging energy scale EC) suppress the mean conductance g(E) much stronger than its standard deviation σ(E). At sufficiently low energies E* any distribution becomes broad, with σ(E*) g(E*), leading to strong local fluctuations of the tunneling density of states. Percolative nature of metal-insulator transition is established by combination of analytic and numerical analysis of the matrix renormalization group equations.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.