Pseudogap induced by short-range spin correlations in a doped Mott insulator

B. Kyung, S. S. Kancharla, D. Sénéchal, A. M S Tremblay, M. Civelli, B Kotliar

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Abstract

We study the evolution of a Mott-Hubbard insulator into a correlated metal upon doping in the two-dimensional Hubbard model using the cellular dynamical mean-field theory. Short-range spin correlations create two additional bands apart from the familiar Hubbard bands in the spectral function. Even a tiny doping into this insulator causes a jump of the Fermi energy to one of these additional bands and an immediate momentum-dependent suppression of the spectral weight at this Fermi energy. The pseudogap is closely tied to the existence of these bands. This suggests a strong-coupling mechanism that arises from short-range spin correlations and large scattering rates for the pseudogap phenomenon seen in several cuprates.

Original languageEnglish (US)
Article number165114
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number16
DOIs
Publication statusPublished - Apr 21 2006

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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