Fixed Point of the Spin-Fermion Model Doped with a Single Fermion

Nobuo Furukawa, Masatoshi Imada

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Spin-fermion model on a square lattice is investigated in the perturbation expansion in terms of the spin-fermion Kondo coupling. The fermion self-energy is calculated in a selfconsistent treatment by a dominant pole approximation. The quasi-particle excitation of a doped fermion turns out to be totally incoherent. It suggests that the low energy excitations should be described by the bound state of a fermion and spins as a collective mode and imply that the fixed point of the spin-fermion model with a single fermion is the t-J model. It also suggests the spin-charge separation of the low energy excitations in the light doping region of these two models.

Original languageEnglish
Pages (from-to)2048-2055
Number of pages8
JournalJournal of the Physical Society of Japan
Volume61
Issue number6
DOIs
Publication statusPublished - 1992 Jan 1
Externally publishedYes

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fermions
excitation
polarization (charge separation)
elementary excitations
energy
poles
perturbation
expansion
approximation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Fixed Point of the Spin-Fermion Model Doped with a Single Fermion. / Furukawa, Nobuo; Imada, Masatoshi.

In: Journal of the Physical Society of Japan, Vol. 61, No. 6, 01.01.1992, p. 2048-2055.

Research output: Contribution to journalArticle

Furukawa, Nobuo ; Imada, Masatoshi. / Fixed Point of the Spin-Fermion Model Doped with a Single Fermion. In: Journal of the Physical Society of Japan. 1992 ; Vol. 61, No. 6. pp. 2048-2055.
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