179 citations · 2.1k across the 56 of their papers we have counts for
5 papers · 1 filter
Temperature dependence of optical spectral weights in quarter-filled ladder systems
Markus Aichhorn, Peter Horsch, Wolfgang von der Linden +1
The temperature dependence of the integrated optical conductivity I(T) reflects the changes of the kinetic energy as spin and charge correlations develop. It provides a unique way…
Density response of the t-J model and renormalization of breathing and half-breathing phonon modes: A slave-fermion calculation
P. Horsch, G. Khaliullin, V. Oudovenko
The density fluctuation spectrum is calculated for the t-J model in the low-doping regime using a slave-fermion method for the constrained fermions. The obtained res…
Density response of cuprates and renormalization of breathing phonons
P. Horsch, G. Khaliullin
We analyse the dynamical density fluctuation spectra for cuprates starting from the model in a slave-boson 1/N representation. The results obtained are consistent with diagon…
Optical conductivity of doped manganites: Comparison of ferromagnetic Kondo Lattice Models with and without orbital degeneracy
Frank Mack, Peter Horsch
The optical conductivity of the double exchange and the orbital degenerate Kondo lattice Hamiltonian (orbital t-J model) are invetigated by means of finite temperature diagonalizat…
Spin Order due to Orbital Fluctuations: Cubic Vanadates
G. Khaliullin, P. Horsch, A. M. Oles
We investigate the highly frustrated spin and orbital superexchange interactions in cubic vanadates. The fluctuations of orbitals trigger a {\it novel mechanism of ferroma…