Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-11-18
Published in Eur. Phys. Jour. B30, 295-301, (2002)
Physics
Condensed Matter
Strongly Correlated Electrons
21 pages, 3 figures
Scientific paper
10.1140/epjb/e2002-00382-7
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 $(t^f = 0)$. 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.
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