4 papers
Self-consistent treatment of dynamical correlation functions using a spectral representation technique
M. Letz, F. Marsiglio
A system of equations resulting from an approximation of the equation of motion of Green functions for correlated electron systems is usually solved using Matsubara technique. In t…
Crossover from BCS superconductivity to BEC of pairs: The role of the lifetime of the pairs
M. Letz
The understanding of an electron gas with short coherence length pairs formed by an attractive interaction is believed to be one of the major keys to our theoretical knowledge of t…
The Attractive Hubbard Model in 2D: Is it capable of describing a pseudogap and preformed pairs?
M. Letz
Deviations from Fermi liquid behavior are well documented in the normal state of the cuprate superconductors, and some of these differences seem to be related to pre-transitional f…
Level statistics and localization in a 2D quantum percolation problem
M. Letz, K. Ziegler
A two dimensional model for quantum percolation with variable tunneling range is studied. For this purpose the Lifshitz model is considered where the disorder enters the Hamiltonia…