5 papers
Temperature dependence of the collective mode and its influence on the band splitting in bilayer cuprates
S. Varlamov, G. Seibold
The recently observed bilayer splitting in high-T cuprates is analyzed within a model where the charge carriers are coupled to a phenomenological bosonic spectrum which interpo…
Influence of the pseudogap on the superconductivity-induced phonon renormalization in high-T superconductors
S. Varlamov, G. Seibold
We investigate the influence of a d-density wave (DDW) gap on the superconductivity-induced renormalization of phonon frequency and linewidth. The results are discussed with respec…
Effective interactions in the stripe state of the two-dimensional Hubbard model
S. Varlamov, G. Seibold
We investigate the structure of the pairing potential in the stripe phase of the two-dimensional Hubbard model. Based on the random phase approximation we discuss in detail the int…
Dynamical charge susceptibility in layered cuprates: the influence of screened inter-site Coulomb repulsion
M. Eremin, I. Eremin, S. Varlamov
The analytical expression for dynamical charge susceptibility in layered cuprates has been derived in the frame of singlet-correlated band model beyond random-phase-approximation (…
Relationship between incommensurability and superconductivity in Peierls distorted charge-density-wave systems
G. Seibold, S. Varlamov
We study the pairing potential induced by fluctuations around a charge-density wave (CDW) with scattering vector Q by means of the Froehlich transformation. For general commensurab…