Berlin 2005 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 7: Correlated Electrons - (General) Theory II

TT 7.8: Vortrag

Freitag, 4. März 2005, 18:30–18:45, TU H2053

Localization of non-interacting electrons in thin layered disordered systems — •V. Z. Cerovski, R. K. Brojen Singh, and M. Schreiber — Institut für Physik, Technische Universität Chemnitz, D-09107 Chemnitz

Localization of electronic states in disordered thin layered systems with b layers is studied using the transfer-matrix method and finite-size scaling of the inverse smallest Lyapunov exponent. The results support the one-parameter scaling theory of localization for disorder strengths W studied and b= 1,…, 6. The obtained results for the localization length are in good agreement with both the analytical results of the self-consistent theory of localization and the numerical scaling studies of the two-dimensional Anderson model. The localization length near the band center grows exponentially with b for a fixed W but no localization-delocalization transition takes place.