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cond-mat.str-el2001
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…
cond-mat.str-el2001
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…
cond-mat.str-el2001
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…