Charge Gap, Charge Susceptibility and Spin Correlation in the Hubbard Model on a Square Lattice

Nobuo Furukawa, Masatoshi Imada

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Quantum Monte Carlo study of the Hubbard model on a square lattice in the ground state is reported. For the on-site interaction U=4 scaled by the transfer, the charge excitation gap at the half-filling is estimated to be δ, = 0.58±0.08. Near half-filling, the charge compressibility k follows the form k∝ δ-1 for the doping concentration δ, indicating a divergent behavior as the system approaches half-filling, while k = 0 at the half-filling. The incommensurate spin correlation length ∊ scales as [formula omitted].

Original languageEnglish
Pages (from-to)3604-3607
Number of pages4
JournalJournal of the Physical Society of Japan
Volume60
Issue number11
DOIs
Publication statusPublished - 1991 Jan 1
Externally publishedYes

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magnetic permeability
compressibility
ground state
excitation
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Charge Gap, Charge Susceptibility and Spin Correlation in the Hubbard Model on a Square Lattice. / Furukawa, Nobuo; Imada, Masatoshi.

In: Journal of the Physical Society of Japan, Vol. 60, No. 11, 01.01.1991, p. 3604-3607.

Research output: Contribution to journalArticle

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