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- Universitätsmedizin GreifswaldDE27 papers
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9 papers · 2 filters
Photoemission spectra of many-polaron systems
M. Hohenadler, D. Neuber, W. von der Linden +3
The cross over from low to high carrier densities in a many-polaron system is studied in the framework of the one-dimensional spinless Holstein model, using unbiased numerical meth…
Local distribution approach to disordered binary alloys
Andreas Alvermann, Holger Fehske
We study the electronic structure of the binary alloy and (quantum) percolation model. Our study is based on a self-consistent scheme for the distribution of local Green functions.…
Microscopic modelling of doped manganites
Alexander Weisse, Holger Fehske
Colossal magneto-resistance manganites are characterised by a complex interplay of charge, spin, orbital and lattice degrees of freedom. Formulating microscopic models for these co…
Unusual localisation effects in quantum percolation
Gerald Schubert, Alexander Weisse, Holger Fehske
We present a detailed study of the quantum site percolation problem on simple cubic lattices, thereby focussing on the statistics of the local density of states and the spatial str…
Delocalisation transition in chains with correlated disorder
Gerald Schubert, Alexander Weisse, Holger Fehske
We show that in the one-dimensional (1D) Anderson model long-range correlations within the sequence of on-site potentials may lead to a region of extended states in the vicinity of…
Characterisation of Anderson localisation using distributions
A. Alvermann, G. Schubert, A. Weisse +2
We examine the use of distributions in numerical treatments of Anderson localisation and supply evidence that treating exponential localisation on Bethe lattices recovers the overa…