Susceptibility of the one-dimensional dimerized Hubbard model

Frédéric Mila, Karlo Penc

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Abstract

We show that the zero-temperature susceptibility of the one-dimensional, dimerized Hubbard model at quarter-filling can be accurately determined on the basis of exact diagonalization of small clusters. The best procedure is to perform a finite-size scaling of the spin velocity uσ, and to calculate the susceptibility from the Luttinger-liquid relation χ=2/πuσ. We show that these results are reliable by comparing them with the analytical results that can be obtained in the weak- and strong-coupling limits. We have also used quantum Monte Carlo simulations to calculate the temperature dependence of the susceptibility for parameters that should be relevant to the Bechgaard salts. This shows that, used together, these numerical techniques are able to give precise estimates of the low-temperature susceptibility of realistic one-dimensional models of correlated electrons.

Original languageEnglish
Pages (from-to)1997-2000
Number of pages4
JournalPhysical Review B
Volume51
Issue number3
DOIs
Publication statusPublished - Jan 1 1995

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ASJC Scopus subject areas

  • Condensed Matter Physics

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