Spin-gap state and superconducting correlations in a one-dimensional dimerized t-J model

Masatoshi Imada*

*この研究の対応する著者

研究成果査読

29 被引用数 (Scopus)

抄録

The phase diagram of one-dimensional dimerized t-J model is investigated by exact-diagonalization, quantum tranfer-matrix, and quantum Monte Carlo methods. The spin gap persists near but away from half-filling as well as in a strongly dimerized region, while the charge can be described as a Tomonaga-Luttinger liquid in the entire region. The spin-gap region extends to the weak-dimerization region as well as to the Haldane-gap region. Critical exponents of various correlation functions are discussed. The pairing correlation shows remarkable enhancement and by far dominates over other correlations near half-filling. At quarter filling, charge-gap formation is observed.

本文言語English
ページ(範囲)550-556
ページ数7
ジャーナルPhysical Review B
48
1
DOI
出版ステータスPublished - 1993
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学

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