论文标题
Kitaev NA $ _2 $ CO $ _2 $ _2 $ _6 $旋转液体候选者的磁接地状态
Magnetic ground state of the Kitaev Na$_2$Co$_2$TeO$_6$ spin liquid candidate
论文作者
论文摘要
作为候选Kitaev材料，NA $ _2 $ CO $ _2 $ _2 $ _6 $在蜂窝状晶格上展示了吸引人的磁性，据信是$ C_3 $ - 米对称。在这里，我们报告了在$ a $轴磁场下对高质量单晶的中子衍射研究。我们的数据支持磁接地状态的较不常见的概念，该概念对应于三重-Mathbf {Q} $磁性结构，$ C_3 $对称性，而不是原型kitaev kitaev旋转液体液体候选物中通常假定的多域锯齿形结构。特别是，我们发现该领域无法重新填充所假定的曲折域，唯一的替代解释是该域是由迄今未识别的不明结构原因强烈固定的。如果三重 - $ \ mathbf {q} $结构是正确的，则需要重新评估许多候选Kitaev材料。我们还发现，大约10个特斯拉以上的田地抑制了远程防铁磁性秩序，从而使新的磁性行为与自旋液体的预期不同。
As a candidate Kitaev material, Na$_2$Co$_2$TeO$_6$ exhibits intriguing magnetism on a honeycomb lattice that is believed to be $C_3$-symmetric. Here we report a neutron diffraction study of high quality single crystals under $a$-axis magnetic fields. Our data support the less common notion of a magnetic ground state that corresponds to a triple-$\mathbf{q}$ magnetic structure with $C_3$ symmetry, rather than the multi-domain zigzag structure typically assumed in prototype Kitaev spin liquid candidates. In particular, we find that the field is unable to repopulate the supposed zigzag domains, where the only alternative explanation is that the domains are strongly pinned by hitherto unidentified structural reasons. If the triple-$\mathbf{q}$ structure is correct then this requires reevaluation of many candidate Kitaev materials. We also find that fields beyond about 10 Tesla suppress the long range antiferromagnetic order, allowing new magnetic behavior to emerge different from that expected for a spin liquid.
