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arXiv 1702.07161cond-mat.str-el
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muSR探测SrDy $_2$ O $_4$阻挫磁体自旋液体基态的证据

Evidence for spin liquid ground state in SrDy$_2$O$_4$ frustrated magnet probed by muSR

N. Gauthier, B. Prévost, A. Amato, C. Baines, V. Pomjakushin, A. D. Bianchi, R. J. Cava, M. Kenzelmann

摘要:

在SrDy $_2$ O $_4$上进行了μ子自旋弛豫($μ$ SR)测量,这是一种在低温下具有短程磁关联的受抑磁体。零场μ子自旋去极化测量表明,快速磁波动存在从$T=300$ K下降到20 mK。在$T=20$ mK附近的短程磁关联和涨落的共存表明SrDy $_2$ O $_4$具有自旋液体基态的特征。大的纵向场对μ子自旋去极化的影响很弱,也表明存在快速涨落。对于$μ_0H=2$ T的纵向场,在低于$T=6$ K时出现非弛豫不对称贡献,这表明随着场诱导的磁有序相的接近,磁波动显著减慢。

英文摘要:

Muon spin relaxation ($μ$SR) measurements were carried out on SrDy$_2$O$_4$, a frustrated magnet featuring short range magnetic correlations at low temperatures. Zero-field muon spin depolarization measurements demonstrate that fast magnetic fluctuations are present from $T=300$ K down to 20 mK. The coexistence of short range magnetic correlations and fluctuations at $T=20$ mK indicates that SrDy$_2$O$_4$ features a spin liquid ground state. Large longitudinal fields affect weakly the muon spin depolarization, also suggesting the presence of fast fluctuations. For a longitudinal field of $μ_0H=2$ T, a non-relaxing asymmetry contribution appears below $T=6$ K, indicating considerable slowing down of the magnetic fluctuations as field-induced magnetically-ordered phases are approached.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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