26 citations · 101 across the 14 of their papers we have counts for
8 papers · 1 filter
Spatial dispersion in CaF caused by the vicinity of an excitonic bound state
M. Letz, W. Mannstadt, M. Brinkmann +1
The microscopic mechanism beyond the optical anisotropy of an ionic crystal which occurs for short wavelengths is investigated. The electron-hole, two particle propagator and its a…
The electron gas with a strong pairing interaction: Three particle correlations and the Thouless instability
M. Himmerich, M. Letz
We derive simplified Faddeev type equations for the three particle T-matrix which are valid in the Hubbard model where only electrons with opposite spins interact. Using the approx…
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…
Spectral Properties of the Attractive Hubbard Model
M. Letz, R. J. Gooding
Deviations from Fermi liquid behavior are well documented in the normal state of the cuprate superconductors, and some of these differences are possibly related to pre-formed pairs…