N ov 2 00 3 Exact ground - state for the periodic Anderson model in D = 2 dimensions at finite value of the interaction and absence of the direct hopping in the correlated f - band
نویسنده
چکیده
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 = 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. Typeset using REVTEX 1
منابع مشابه
1 8 N ov 2 00 3 Plaquette operators used in the rigorous study of ground - states of the Periodic Anderson Model in D = 2 dimensions
The derivation procedure of exact ground-states for the periodic Anderson model (PAM) in restricted regions of the parameter space and D = 2 dimensions using plaquette operators is presented in detail. Using this procedure, we are reporting for the first time exact ground-states for PAM in 2D and finite value of the interaction, whose presence do not require the next to nearest neighbor extensi...
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