arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.08781cond-mat.str-el
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Na2Co2TeO6的低温自旋轨道相行为

Spin-orbit phase behaviors of Na2Co2TeO6 at low temperatures

Wenjie Chen, Xintong Li, Zhenhai Hu, Ze Hu, Li Yue, Ronny Sutarto, Feizhou He, Kazuki Iida, Kazuya Kamazawa, Weiqiang Yu, Xi Lin, Yuan Li

摘要:

我们提出了一个全面的研究单晶Na2Co2TeO6,一个假定的Kitaev蜂窝磁铁,专注于其低温相行为。一个新的热相变被确定在31.0 K,低于该系统开发一个二维(2D)的长程磁秩序。该顺序先于26.7 K以下的众所周知的3D顺序,并且可能由强各向异性相互作用驱动。令人惊讶的是,来自3D秩序的激发并不支持该秩序普遍接受的“锯齿”性质,而是与“三重q”描述一致。3D秩序对可能涉及轨道自由度的高能激发施加基本反馈,并且在达到低得多的温度之前保持高度受挫。这些发现使Na2Co2TeO6成为一种自旋轨道纠缠的受抑磁体,具有非常丰富的物理性质。

英文摘要:

We present a comprehensive study of single crystals of Na2Co2TeO6, a putative Kitaev honeycomb magnet, focusing on its low-temperature phase behaviors. A new thermal phase transition is identified at 31.0 K, below which the system develops a two-dimensional (2D) long-range magnetic order. This order precedes the well-known 3D order below 26.7 K, and is likely driven by strongly anisotropic interactions. Surprisingly, excitations from the 3D order do not support the order's commonly accepted "zigzag" nature, and are instead consistent with a "triple-q" description. The 3D order exerts a fundamental feedback on high-energy excitations that likely involve orbital degrees of freedom, and it remains highly frustrated until a much lower temperature is reached. These findings render Na2Co2TeO6 a spin-orbit entangled frustrated magnet that hosts very rich physics.

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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