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16 papers · 1 filter
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.…
First result on a laser-heated emissive probe
Ramin Madani, Codrina Ionita, Roman Schrittwieser +1
The floating potential of a probe, emitting a sufficiently high electron current, yields a fairly accurate approximation of the plasma potential. This is an advantage in comparison…
Melting of 2D Coulomb clusters in dusty plasmas
Ryuta Ichiki, Yuriy Ivanov, Matthias Wolter +2
The melting of 2D dust clusters caused by one additional particle in the lower layer has experimentally been observed to undergo a two-step transition, which divides the phase of t…
Constricted Boron Nanotubes
Jens Kunstmann, Alexander Quandt
The recent discovery of pure boron nanotubes raises questions about their detailed atomic structure. Previous simulations predicted tubular structures with smooth or puckered surfa…
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…