55 citations · 181 across the 7 of their papers we have counts for
5 papers · 2 filters
Quantum phase transitions in one-dimensional electron-phonon systems
Holger Fehske, Eric Jeckelmann
We discuss the Luttinger-liquid charge-density-wave and Peierls-insulator Mott-insulator quantum phase transitions in 1D electron-phonon systems.
Exact numerical methods for electron-phonon problems
Eric Jeckelmann, Holger Fehske
We present the basic principles of exact diagonalization and (dynamical) density-matrix renormalization-group approaches to the calculation of ground state and dynamical properties…
Unusual quasi-one-dimensional electron dispersions in the spin-1/2 quantum magnet TiOCl
M. Hoinkis, M. Sing, J. Schaefer +8
We have studied the electronic structure of the spin-1/2 quantum magnet TiOCl by polarization-dependent momentum-resolved photoelectron spectroscopy. From that, we confirm the quas…
Hole doped Hubbard ladders
H. Fehske, G. Hager, G. Wellein +1
The formation of stripes in six-leg Hubbard ladders with cylindrical boundary conditions is investigated for two different hole dopings, where the amplitude of the hole density mod…
Optical conductivity of the one-dimensional dimerized Hubbard model at quarter filling
Holger Benthien, Eric Jeckelmann
We investigate the optical conductivity in the Mott insulating phase of the one-dimensional extended Hubbard model with alternating hopping terms (dimerization) at quarter band fil…