Impurity Effect on Spin Ladder System

Yukitoshi Motome, Nobuyuki Katoh, Nobuo Furukawa, Masatoshi Imada

研究成果: Article査読

51 被引用数 (Scopus)

抄録

Effects of nonmagnetic impurity doping in a spin ladder system with a spin gap are investigated by exact diagonalization and variational Monte Carlo calculations. Substantial changes in macroscopic properties such as enhancements in spin correlations and magnetic susceptibilities are observed in the low impurity concentration region, which are due to an increase of low-energy states. These results suggest that a small but finite amount of nonmagnetic impurity doping causes reduction or disappearance of the spin gap. This qualitatively explains the experimental results for Zn-doped SrCu2O3 in which a small amount of doping results in disappearance of the spin gap. We propose a possible scenario for this marked change as a quantum phase transition in a spin-gap ladder system due to spinon doping effects.

本文言語English
ページ(範囲)1949-1952
ページ数4
ジャーナルjournal of the physical society of japan
65
7
DOI
出版ステータスPublished - 1996
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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