Spin-gap phase in nearly half-filled one-dimensional conductors coupled with phonons

K. Yonemitsu, M. Imada

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Asymptotic properties of nearly half-filled one-dimensional conductors coupled with phonons are studied through a renormalization-group method. Due to spin-charge coupling via an electron-phonon interaction, the spin correlation varies with filling as well as the charge correlation. Depending on the relation between cutoff energy scales of the umklapp process and of the electron-phonon interaction, various phases appear. We find a metallic phase with a spin gap and a dominant charge-density-wave correlation near half filling between a gapless density-wave phase (like in the doped repulsive Hubbard model) and a superconductor phase with a spin gap. The spin gap is produced by phonon-assisted backward scatterings that interfere with the umklapp process constructively or destructively depending on the character of electron-phonon coupling.

本文言語English
ページ(範囲)2410-2420
ページ数11
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
54
4
DOI
出版ステータスPublished - 1996
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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