39 citations · 258 across the 36 of their papers we have counts for
4 papers · 1 filter
Gapless metallic charge-density-wave phase driven by strong electron correlations
Romuald Lemański, Klaus Ziegler
We analyze the transformation from insulator to metal induced by thermal fluctuations within the Falicov-Kimball model. Using the Dynamic Mean Field Theory (DMFT) formalism on the…
Anderson localization in a two-dimensional random gap model
A. Hill, K. Ziegler
We study the properties of the spinor wavefunction in a strongly disordered environment on a two-dimensional lattice. By employing a transfer-matrix calculation we find that there…
Metal-insulator transition in three-dimensional semiconductors
K. Ziegler
We use a random gap model to describe a metal-insulator transition in three-dimensional semiconductors due to doping and find a conventional phase transition, where the effective s…
Optical conductivity for the surface of a Topological Insulator
D. Schmeltzer, K. Ziegler
The optical conductivity for the surface excitations for a Topological Insulator as a function of the chemical potential and disorder is considered. Due to the time reversal symmet…