Correlated band structure of NiO, CoO and MnO by variational cluster approximation (2008)
The variational cluster approximation proposed by Potthoff is applied to the calculation of the single-particle spectral function of the transition metal oxides MnO, CoO and NiO. Trial self-energies...
Spin-polaron band structure and hole pockets in underdoped cuprates (2008)
Wrobel, P., Suleja, W., Eder, R.
We present a variational approach based on the string picture to analyze the internal structure and dispersion of spin polarons with different symmetries in an antiferromagnet. We then use this to...
We use numerical and analytical results to construct a simple ansatz for the energy dynamical correlation function of the 1D antiferromagnetic Heisenberg model. This is applied to compute the phonon...
Excitons in C60 studied by temperature-dependent optical second-harmonic generation (1995)
Eder, R., Koopmans, B., Jonkman, H.T., Sawatzky, G.A.
The electric-dipole-forbidden 1T1g excitonic state of solid C60 at ħω=1.81 eV can be probed with a second-harmonic generation (SHG) experiment. We show that the SHG line shape depends strongly on...
Romanski, J, Berkès, I, Brown, D E, De Jésus, M, Eder, R, Grant, I S, ...