Quasiparticle anisotropy and pseudogap formation from the weak-coupling renormalization group point of view

A. A. Katanin, A. P. Kampf

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

The evaluation of the self energy in the weak-coupling regime of the 2D t-t Hubbard model using one-loop functional renormalization group technique was discussed. It was found that at van Hove (vH) band fillings, the qp weight along the FS vanished from the BZ diagonal towards the point where the qp concept was invalid. The qp weight suppression was accompanied by the growth of two additional incoherent peaks in the spectral function, from which the an anisotropic pseudogap originated. The results provided weak-coupling for pseudogap formation and provided implications for the evolution of anisotropic spectral properties at finite temperatures on the metallic side of the transition to an AF insulator.

Original languageEnglish
Article number106406
Pages (from-to)106406-1-106406-4
JournalPhysical Review Letters
Volume93
Issue number10
DOIs
Publication statusPublished - 3 Sep 2004
Externally publishedYes

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