Effect of the hole doping into the Haldane-gap state on the one-dimensional S = 1 t-J model

Yoshihiro Nishiyama, Masuo Suzuki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The ground state and the excitation spectra of the S = 1 Heisenberg spin chain with hole hopping are investigated by means of the numerical-diagonalization method and with the help of the Zhang-Arovas picture. The phase diagrams for both the spin and charge sectors are sketched. As for the charge sector, two phases are found: Namely, a phase separation occurs in the weak-hopping region, while the system shows a Tomonaga-Luttinger-liquid phase in the strong-hopping region. In spite of the presence of the spin gap, the present phase diagram is similar to that reported for the S = 1/2 t-J chain with gapless spin excitations rather than to that for the magnetically frustrated t-J chain with a spin gap. In the spin sector, the string correlation is found to persist even in the over-doped area except in a region, which can be characterized by non-zero value of a generalized string correlation.

Original languageEnglish
Pages (from-to)41-52
Number of pages12
JournalPhysica B: Condensed Matter
Volume225
Issue number1-2
DOIs
Publication statusPublished - Jul 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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