We report for the first time exact ground-states deduced for the D = 2 dimensional generic periodic Anderson model at finite U, the Hamiltonian of the model not containing direct hopping terms for f-electrons (tf = 0). The deduced itinerant phase presents non-Fermi liquid properties in the normal phase, emerges for real hybridization matrix elements, and not requires anisotropic unit cell. In order to deduce these results, the plaquette operator procedure has been generalised to a block operator technique which uses blocks higher than an unit cell and contains f-operator contributions acting only on a single central site of the block.
- 05.30.Fk Fermion systems and electron gas
- 67.40.Db Quantum statistical theory; ground state, elementary excitations
- 71.10.Hf Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics