1.1k citations · 1.3k across the 12 of their papers we have counts for
12 papers
Optical absorption and activated transport in polaronic systems
G. Schubert, G. Wellein, A. Weiße +2
We present exact results for the optical response in the one-dimensional Holstein model. In particular, by means of a refined kernel polynomial method, we calculate the ac and dc e…
The Kernel Polynomial Method
Alexander Weisse, Gerhard Wellein, Andreas Alvermann +1
Efficient and stable algorithms for the calculation of spectral quantities and correlation functions are some of the key tools in computational condensed matter physics. In this ar…
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…
Optical response of electrons in a random potential
Alexander Weisse, Gerald Schubert, Holger Fehske
Using our recently developed Chebyshev expansion technique for finite-temperature dynamical correlation functions we numerically study the AC conductivity of the Anderson mo…
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…
Bose-Einstein condensation of magnons in TlCuCl
J. Sirker, A. Weisse, O. P. Sushkov
A quantitative study of the field-induced magnetic ordering in TlCuCl in terms of a Bose-Einstein condensation (BEC) of magnons is presented. It is shown that the hitherto prop…