论文标题
吉塔夫材料中的半成分量量量量异常的热厅效应$α$ -rucl $ _3 $
Half-integer quantized anomalous thermal Hall effect in the Kitaev material $α$-RuCl$_3$
论文作者
论文摘要
由Majorana边缘模式在磁性绝缘体中介导的热传输导致半全量量子大厅电导，最近据报道，二维蜂窝材料$α$ -rucl $ _3 $。虽然传统的电子厅效应需要垂直磁场，但我们发现在$α$ -rucl $ _3 $中并非如此。令人惊讶的是，即使对于没有平面外部成分的磁场，热厅高原也出现。量化的热厅电导的场 - 角变化具有与纯kitaev旋转液体的Majorana频带结构相同的拓扑Chern数的符号结构，即$ \ pm $ 1。对半耗时异常的热厅效应的观察确定，基塔夫相互作用是造成的，并且在$ -rucl $ _3 $ _3 $ _3 $的$α$ -rucl $ _3 $中，即使存在于$α$ -rucl $ _rucl $ _3 $的非kitaev相互作用的情况下，与本地磁矩的分数相关的非亚洲拓扑顺序仍然存在。
Heat transport mediated by Majorana edge modes in a magnetic insulator leads to a half-integer thermal quantum Hall conductance, which has recently been reported for the two-dimensional honeycomb material $α$-RuCl$_3$. While the conventional electronic Hall effect requires a perpendicular magnetic field, we find that this is not the case in $α$-RuCl$_3$. Strikingly, the thermal Hall plateau appears even for a magnetic field with no out-of-plane components. The field-angular variation of the quantized thermal Hall conductance has the same sign structure of the topological Chern number, which is either $\pm$1, as the Majorana band structure of the pure Kitaev spin liquid. This observation of a half-integer anomalous thermal Hall effect firmly establishes that the Kitaev interaction is primarily responsible and that the non-Abelian topological order associated with fractionalization of the local magnetic moments persists even in the presence of non-Kitaev interactions in $α$-RuCl$_3$.
