竞争的反铁磁-铁磁状态在一个基塔耶夫蜂磁体中
Hector K Vivanco1,2, Benjamin A Trump3, Craig M Brown3,4
1Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, USA.
Physical review. B
|September 18, 2023
概括
研究人员在Li3Co2SbO6中发现了基塔耶夫旋转液体物理学的签名,这是一种带有高旋转d7离子的蜂巢磁体. 这一发现表明了在d7系统中探索量子自旋液体的新可能性,补充了现有的d5材料.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子材料是一种量子材料.
- 磁力学 磁力学 是一种
背景情况:
- 基塔耶夫模型描述了一个拓量子自旋液体,这是一个具有异国情调的罕见物质状态.
- 之前的研究集中在低旋转的d5材料 (例如,Ir,Ru) 基塔耶夫旋转液体物理学.
- 高旋转d7系统为探索基塔耶夫旋转液体候选人提供了一个新的途径.
研究的目的:
- 在蜂巢磁铁Li3Co2SbO6.6中调查Kitaev旋转液体物理学的签名.
- 为了探索蜂网中的高旋转d7离子的磁性.
- 为了将实验结果与基塔耶夫旋转液体的理论模型进行比较.
主要方法:
- 通过中子粉的衍射来确定磁体的秩序和结构.
- 测量热容量以分析热力学特性.
- 磁化研究以探测不同场和温度下的磁反应.
主要成果:
- 观测到远程反铁磁秩序低于11K,磁与接近基塔耶夫自旋液态相一致.
- 具有XY异质性和Ising类层间相互作用的特征性磁性秩序,在应用磁场下过渡到铁磁性秩序.
- 特定热数据与异型基塔耶夫模型的定量比较支持基塔耶夫旋转液态的接近.
结论:
- Li3Co2SbO6显示了基塔耶夫自旋液体物理学的关键特征,由高自旋d7离子驱动.
- 这种材料扩大了实现基塔耶夫旋转液体的材料范围,超出了传统的d5系统.
- 这些发现凸显了d7蜂磁铁作为量子自旋液体研究的丰富平台的潜力.
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