Pseudogap and Mott transition studied by cellular dynamical mean-field theory

Y. Z. Zhang, Masatoshi Imada

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Abstract

We study metal-insulator transitions between Mott insulators and metals. The transition mechanism completely different from the original dynamical mean field theory (DMFT) emerges from a cluster extension of it. A consistent picture suggests that the quasiparticle weight Z remains nonzero through metals and suddenly jumps to zero at the transition, while the gap opens continuously in the insulators. This is in contrast with the original DMFT, where Z continuously vanishes but the gap opens discontinuously. The present results arising from electron differentiation in momentum space agree with recent puzzling bulk-sensitive experiments on CaV O3 and SrV O3.

Original languageEnglish
Article number045108
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number4
DOIs
Publication statusPublished - 2007 Jul 17

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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