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Thermodynamics and Dynamics of Correlated Electron Systems

In: High Performance Computing in Science and Engineering ’02

Author

Listed:
  • Catia Lavalle

    (Universität Stuttgart, Institut für Theoretische Physik III)

  • M. Rigol

    (Universität Stuttgart, Institut für Theoretische Physik III)

  • M. Feldbacher

    (Universität Stuttgart, Institut für Theoretische Physik III)

  • Fakher F. Assaad

    (Universität Stuttgart, Institut für Theoretische Physik III
    Max Planck institute for solid state research)

  • Alejandro Muramatsu

    (Universität Stuttgart, Institut für Theoretische Physik III
    Max Planck institute for solid state research)

Abstract

Based on state of the art Quantum Monte Carlo simulations, we investigate the metallic states of the one-dimensional t-J model and of a depleted Kondo lattice model in two dimensions. In the one-dimensional case, it is known that correlation effects invalidate the Fermi liquid picture and that the elementary excitations are spinons and holons carrying separately the charge and spin of the electron. In this dimension we will present new results on the single particle spectral function and discuss the implications of spin-charge separation on this quantity. The Kondo lattice model describes heavy fermion materials which generically have Fermi liquid ground states but with effective masses up to three orders of magnitude larger that the bare electron mass. On the basis of numerical simulations, we will show how this heavy fermion state comes about and set the emphasis on the coherence temperature.

Suggested Citation

  • Catia Lavalle & M. Rigol & M. Feldbacher & Fakher F. Assaad & Alejandro Muramatsu, 2003. "Thermodynamics and Dynamics of Correlated Electron Systems," Springer Books, in: Egon Krause & Willi Jäger (ed.), High Performance Computing in Science and Engineering ’02, pages 181-193, Springer.
    • Handle: RePEc:spr:sprchp:978-3-642-59354-3_15
    DOI: 10.1007/978-3-642-59354-3_15
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