Increase of Superconducting Correlation due to Dimensionality Change in Quasi-One-Dimensional Conductors

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dc.creatorFuseya, Yuki
dc.creatorOgata, Masao
dc.date2008-04-02
dc.date.accessioned2026-07-07T09:29:50Z
dc.date.available2026-07-07T09:29:50Z
dc.descriptionResponse functions for spin-density-wave (SDW) and d-wave singlet superconductivity ($d$SC) in quasi-one-dimensional (Q1D) electron systems are calculated by a renormalization group technique. It is shown that the response functions for both SDW, $χ_\rs$, and $d$SC, $χ_d$, are enhanced by interchain hopping, $t_\perp$, i.e., by quasi-one dimensionality. When the Fermi surface deviates from perfect nesting, $χ_\rs$ saturates below the energy scale of imperfectness of the nesting, while $χ_d$ is hardly affected. Consequently, the superconducting correlation increases even away from the SDW phase. This gives a possible interpretation of the recent experimental results of Q1D organic conductor (TMTTF)$_2$SbF$_6$, where $T_{\rm c}$ increases even away from the SDW phase.
dc.identifierhttps://arxiv.org/abs/0804.0293
dc.identifierhttp://arxiv.org/abs/0804.0293
dc.identifierJournal of the Physical Society of Japan Vol. 76 No. 9, September, 2007, 093701
dc.identifierdoi:10.1143/JPSJ.76.093701
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157934
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleIncrease of Superconducting Correlation due to Dimensionality Change in Quasi-One-Dimensional Conductors
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