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

Y. Z. Zhang, Masatoshi Imada

Research output: Contribution to journalArticle

68 Citations (Scopus)

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
Externally publishedYes

Fingerprint

Mean field theory
Metals
insulators
Metal insulator transition
metals
Momentum
Electrons
momentum
Experiments
electrons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Pseudogap and Mott transition studied by cellular dynamical mean-field theory. / Zhang, Y. Z.; Imada, Masatoshi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 4, 045108, 17.07.2007.

Research output: Contribution to journalArticle

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