Pseudospin representation of the two-dimensional t-J model

Daisuke Yamamoto*, Susumu Kurihara

*この研究の対応する著者

研究成果: Article査読

抄録

We investigate the two-dimensional t-J model describing most of the physical properties of the copper-oxide materials. In this model, due to the single occupancy constraint, the electron operators no longer obey the fermionic anti-commutation relations. By introducing pseudospins associated with empty sites, we derive a representation of the t-J model that consists of spinless fermions and local spins. Within a mean-field approximation, we show that our representation of the t-J model corresponds to the antiferromagnetic Heisenberg model in an effective magnetic field induced by hole doping δ. We show that the staggered magnetization decreases with increasing hole doping δ and disappears at reasonable value of the critical doping δc, which is in good agreement with experiments and numerical calculations.

本文言語English
ページ(範囲)1112-1113
ページ数2
ジャーナルPhysica B: Condensed Matter
403
5-9
DOI
出版ステータスPublished - 2008 4月 1

ASJC Scopus subject areas

  • 材料科学一般
  • 凝縮系物理学

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