Fermi-surface reconstruction without breakdown of kondo screening at the quantum critical point

Hiroshi Watanabe, Masao Ogata

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Abstract

Motivated by recent Hall-effect experiment in YbRh2Si2, we study ground state properties of a Kondo lattice model in a two-dimensional square lattice using variational Monte Carlo method. We show that there are two types of phase transition, an antiferromagnetic transition and a topological one (Fermi-surface reconstruction). In a wide region of parameters, these two transitions occur simultaneously without the breakdown of Kondo screening, accompanied by a discontinuous change of the Hall coefficient. This result is consistent with the experiment and gives a novel theoretical picture for the quantum critical point in heavy-fermion systems.

Original languageEnglish
Article number136401
JournalPhysical Review Letters
Volume99
Issue number13
DOIs
Publication statusPublished - 2007 Sep 25
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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