Effect of Inter-Site Repulsions on Magnetic Susceptibility of One-Dimensional Electron Systems at Quarter-Filling
arXiv:cond-mat/0510164 · doi:10.1143/JPSJ.74.3159
Abstract
The temperature dependence of the magnetic susceptibility, Ï(T), is investigated for one-dimensional interacting electron systems at quarter-filling within the Kadanoff-Wilson renormalization-group method. The forward scattering on the same branch (the g_4-process) is examined together with the backward (g_1) and forward (g_2) scattering amplitudes on opposite branches. In connection with lattice models, we show that Ï(T) is strongly enhanced by the nearest-neighbor interaction, an enhancement that surpasses one of the next-nearest-neighbor interaction. A connection between our predictions for Ï(T) and experimental results for Ï(T) in quasi-one-dimensional organic conductors is presented.
4 pages, 4 figures, to be published in Journal of the Physical Society of Japan, vol. 74, No. 12