This article is cited in 10 papers

Static spin susceptibility in the $t$–$J$ model

A. A. Vladimirov^a, D. Ihle^b, N. M. Plakida<sup>a

a</sup> Joint Institute for Nuclear Research
^b Universität Leipzig

Abstract: Based on the equation-of-motion method for the relaxation function expressed in terms of Hubbard operators, we evaluate the static spin susceptibility and correlation functions in the two-dimensional $t$–$J$ model. We show that at zero temperature, a long-range antiferromagnetic order exists in the lattice for the hole concentration $\delta<\delta_{\mathrm{c}}\simeq 0.018$. The calculated dependences of the spin susceptibility and correlation length on the temperature and hole concentration agree qualitatively with the experiment.

Keywords: strong electron correlation, spin susceptibility, high-temperature superconductivity, $t$–$J$ model.

Received: 27.11.2006

DOI: 10.4213/tmf6109

 English version: Theoretical and Mathematical Physics, 2007, 152:3, 1331–1341

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