title: Correlated random band matrices: localization-delocalization transitions
abstract: We study the statistics of eigenvectors in correlated random band matrix models. These models are characterized by two parameters, the bandwidth B(N) of a Hermitian NxN matrix and the correlation parameter C(N) describing correlations of matrix elements along diagonal lines. The correlated band matrices show a much richer phenomenology than models without correlation as soon as the correlation parameter scales sufficiently fast with matrix size. In particular, for B(N) approximately sqrt[N] and C(N) approximately sqrt[N], the model shows a localization-delocalization transition of the quantum Hall type.
authors.affiliation: Institut fur Theoretische Physik III, Ruhr-Universitat Bochum, 44780 Bochum, Germany.
authors.initials: M
authors.lastname: Janssen
authors.initials: K
authors.lastname: Pracz