1996/08/27 by Takashi Kimura, Kazuhiko Kuroki, Hideo Aoki · 1 citation
Physics and Astronomy · #cond-mat
paper · pdf · doi:10.1103/physrevb.54.r9608
10 pages, revtex, to appear in Physical Review B as a Rapid Communication
arxiv created 1996/08/27 · arxiv updated 2009/11/30
In order to check whether odd-numbered Tomonaga-Luttinger ladders are dominated by antiferromagnetic correlations associated with gapless spin excitations, correlation functions of the doped three-chain Hubbard model are obtained with the bosonization at the renormalization-group fixed point. The correlation of the singlet superconducting pairing across the central and edge chains is found to be dominant, reflecting two gapful spin modes, while the intra-edge spin density wave correlation, reflecting the gapless mode, is only subdominant. This implies that, when there are multiple spin modes, a dominant superconductivity can arise from the presence of \it some spin gap(s) despite the coexistence of power-law correlated spins.