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

K. Yonemitsu, Masatoshi Imada

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2410-2420
Number of pages11
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number4
DOIs
Publication statusPublished - 1996 Jan 1
Externally publishedYes

Fingerprint

Electron-phonon interactions
Phonons
phonons
conductors
Charge density waves
Hubbard model
Umklapp process
Superconducting materials
electron phonon interactions
Scattering
Electrons
asymptotic properties
renormalization group methods
cut-off
scattering
electrons

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Spin-gap phase in nearly half-filled one-dimensional conductors coupled with phonons. / Yonemitsu, K.; Imada, Masatoshi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 54, No. 4, 01.01.1996, p. 2410-2420.

Research output: Contribution to journalArticle

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