Spin gap and antiferromagnetic fluctuation in spin ladder system doped with nonmagnetic impurities

Nobuyuki Katoh*, Yukitoshi Motome, Nobuo Furukawa, Masatoshi Imada

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Effects of nonmagnetic impurity doping in a spin ladder system with a spin gap are investigated by the exact diagonalization and the variational Monte Carlo calculations. Small amount of impurity doping generates a nearly free spin bound to each impurity. These nearly free spins interact each other only weakly giving rise to gapless spin excitations. Another important aspect is that short-ranged antiferromagnetic correlation is enhanced especially around the impurity sites. We propose a possible scenario for this drastic change in the spin gapped ladder system. We also compare with the experimental results of Zn-doped SrCu2O3.

本文言語English
ページ(範囲)621-626
ページ数6
ジャーナルJournal of Low Temperature Physics
105
3-4
DOI
出版ステータスPublished - 1996 1 1
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 材料科学(全般)
  • 凝縮系物理学

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