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

TitrePseudogap induced by short-range spin correlations in a doped Mott insulator
Type de publicationJournal Article
Nouvelles publications2006
AuteursKyung, B, Kancharla, SS, Sénéchal, D, Tremblay, A-MS, Civelli, M, Kotliar, G
JournalPhysical Review B
Volume73
Pagination1651114/1-6
Année de publication2006
Résumé

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.

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