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

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Abstract

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.

Original languageEnglish
Pages (from-to)295-301
Number of pages7
JournalEuropean Physical Journal B
Volume30
Issue number3
DOIs
Publication statusPublished - Dec 1 2002

Keywords

  • 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

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