Pseudospin representation of the two-dimensional t-J model

Daisuke Yamamoto, Susumu Kurihara

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)1112-1113
Number of pages2
JournalPhysica B: Condensed Matter
Volume403
Issue number5-9
DOIs
Publication statusPublished - 2008 Apr 1

Fingerprint

Doping (additives)
Fermions
Copper oxides
Electric commutation
commutation
copper oxides
Magnetization
Physical properties
physical properties
fermions
Magnetic fields
operators
magnetization
Electrons
approximation
magnetic fields
electrons
Experiments

Keywords

  • Antiferromagnetism
  • Pseudospin representation
  • t-J Model

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Pseudospin representation of the two-dimensional t-J model. / Yamamoto, Daisuke; Kurihara, Susumu.

In: Physica B: Condensed Matter, Vol. 403, No. 5-9, 01.04.2008, p. 1112-1113.

Research output: Contribution to journalArticle

Yamamoto, Daisuke ; Kurihara, Susumu. / Pseudospin representation of the two-dimensional t-J model. In: Physica B: Condensed Matter. 2008 ; Vol. 403, No. 5-9. pp. 1112-1113.
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