Spin-glass transition in bond-disordered heisenberg antiferromagnets coupled with local lattice distortions on a pyrochlore lattice

Hiroshi Shinaoka, Yusuke Tomita, Yukitoshi Motome

研究成果: Article査読

34 被引用数 (Scopus)

抄録

Motivated by puzzling characteristics of spin-glass transitions widely observed in pyrochlore-based frustrated materials, we investigate the effects of coupling to local lattice distortions in a bond-disordered antiferromagnet on the pyrochlore lattice by extensive Monte Carlo simulations. We show that the spin-glass transition temperature Tf is largely enhanced by the spin-lattice coupling and, furthermore, becomes almost independent of Δ in a wide range of the disorder strength Δ. The critical property of the spin-glass transition is indistinguishable from that of the canonical Heisenberg spin glass in the entire range of Δ. These peculiar behaviors are ascribed to a modification of the degenerate manifold from a continuous to semidiscrete one by spin-lattice coupling.

本文言語English
論文番号047204
ジャーナルPhysical Review Letters
107
4
DOI
出版ステータスPublished - 2011 7 20
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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