Fermi-liquid theory in the low-density two-dimensional Hubbard model

Sudhakar Yarlagadda, Susumu Kurihara

Research output: Contribution to journalArticle

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Abstract

We examine the validity of Fermi-liquid theory in the low-density two-dimensional Hubbard model. From the ground-state energy we obtain the quasiparticle energy and the Landau interaction function. Then we prove that the quasiparticle-interaction function is finite and that the quasiparticle residue is nonzero for repulsive interactions. We also find, as a function of the excitation energy ε, that the quasiparticle lifetime ∼1/ ε2lnε. Hence, we conclude that Fermi-liquid theory holds in our model.

Original languageEnglish
Pages (from-to)10567-10570
Number of pages4
JournalPhysical Review B
Volume48
Issue number14
DOIs
Publication statusPublished - 1993
Externally publishedYes

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Fermi liquids
Hubbard model
two dimensional models
Excitation energy
Ground state
interactions
energy
life (durability)
ground state
excitation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Fermi-liquid theory in the low-density two-dimensional Hubbard model. / Yarlagadda, Sudhakar; Kurihara, Susumu.

In: Physical Review B, Vol. 48, No. 14, 1993, p. 10567-10570.

Research output: Contribution to journalArticle

Yarlagadda, Sudhakar ; Kurihara, Susumu. / Fermi-liquid theory in the low-density two-dimensional Hubbard model. In: Physical Review B. 1993 ; Vol. 48, No. 14. pp. 10567-10570.
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