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

A. A. Katanin, A. P. Kampf

Результат исследований: Вклад в журналСтатьярецензирование

62 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаАнглийский
Номер статьи106406
Страницы (с-по)106406-1-106406-4
ЖурналPhysical Review Letters
Том93
Номер выпуска10
DOI
СостояниеОпубликовано - 3 сент. 2004
Опубликовано для внешнего пользованияДа

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