65 citations · 203 across the 14 of their papers we have counts for
9 papers · 1 filter
Percolation model for a selective response of the resistance of composite semiconducting np-systems towards reducing gases
Stefanie Russ
It is shown that a two-component percolation model can explain an experimentally observed behavior, namely that a network built up by a mixture of sintered nanocrystalline semicond…
Ising-like dynamics and frozen states in systems of ultrafine magnetic particles
Stefanie Russ, Armin Bunde
We use Monte-Carlo simulations to study aging phenomena and the occurence of spinglass phases in systems of single-domain ferromagnetic nanoparticles under the combined influence o…
Pore opening effects and transport diffusion in the Knudsen regime in comparison to self- (or tracer-) diffusion
S. Zschiegner, S. Russ, A. Bunde +1
We study molecular diffusion in linear nanopores with different types of roughness in the so-called Knudsen regime. Knudsen diffusion represents the limiting case of molecular diff…
Frozen metastable states in ordered systems of ultrafine magnetic particles
Stefanie Russ, Armin Bunde
For studying the interplay of dipolar interaction and anisotropy energy in systems of ultrafine magnetic particles we consider simple cubic systems of magnetic dipoles with anisotr…
Periodic orbit theory in fractal drum
Stefanie Russ, Jesper Mellenthin
The level statistics of pseudointegrable fractal drums is studied numerically using periodic orbit theory. We find that the spectral rigidity , which is a measure for the c…
Localized low-frequency Neumann modes in 2d-systems with rough boundaries
S. Russ, Y. Hlushchuk
We compute the relative localization volumes of the vibrational eigenmodes in two-dimensional systems with a regular body but irregular boundaries under Dirichlet and under Neumann…
A renormalization approach for the 2D Anderson model at the band edge: Scaling of the localization volume
Stefanie Russ
We study the localization volumes (participation ratio) of electronic wave functions in the 2d-Anderson model with diagonal disorder. Using a renormalization procedure, we show…
Scaling of the localization length in linear electronic and vibrational systems with long-range correlated disorder
Stefanie Russ
The localization lengths of long-range correlated disordered chains are studied for electronic wavefunctions in the Anderson model and for vibrational states. A scaling theory clos…
Excess Modes in the Vibrational Spectrum of Disordered Systems and the Boson Peak
Jan W. Kantelhardt, Stefanie Russ, Armin Bunde
We study a disordered vibrational model system, where the spring constants k are chosen from a distribution P(k) ~ 1/k above a cut-off value k_min > 0. We can motivate this distrib…