Evolution of a large fermi surface in the kondo lattice

Junya Otsuki, Hiroaki Kusunose, Yoshio Kuramoto

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Abstract

The single-particle spectrum of the Kondo lattice model is derived with the use of the continuous-time quantum Monte Carlo method, combined with the dynamical mean-field theory. Crossover behavior is traced quantitatively either to a heavy Fermi-liquid state or to a magnetically ordered state from the local-moment state at high temperatures. The momentum distribution in the low-temperature limit acquires a discontinuity at the location that involves the local-spin degrees of freedom. Even without the charge degrees of freedom for local electrons, the excitation spectra exhibit hybridized bands similar to those in the Anderson lattice. Temperature dependence in the zero-energy component of the self-energy is crucial in forming the Fermi-liquid state with the large Fermi surface.

Original languageEnglish
Article number017202
JournalPhysical Review Letters
Volume102
Issue number1
DOIs
Publication statusPublished - Jan 5 2009

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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