Berlin 2005 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 2: Correlated Electrons - Metal Insulator Transition

TT 2.2: Vortrag

Freitag, 4. März 2005, 10:30–10:45, TU H2053

Local Green’s operator and its applications to manganites — •Horacio Aliaga — Theo. III, Uni-Augsburg,D-86135 Augsburg, Germany

An algorithm is presented to calculate the electronic local Green’s operator for manganites-related hamiltonians. This algorithm is proved to scale linearly with the number of states in the Hilbert-space, is able of parallel implementation, and outperforms computationally the Exact Diagonalization (ED) method for clusters larger than 400 sites. This method together with the Monte Carlo (MC) technique is used to derive new results for the manganites phase diagram for the spatial dimension D=3 and half-filling.