Half-integer thermal quantum Hall conductance has recently been reported for the two-dimensional honeycomb material α-RuCl₃. We found that the half-integer thermal Hall plateau appears even for a magnetic field with no out-of-plane components. The measured field-angular variation of the quantized thermal Hall conductance has the same sign structure as the topological Chern number of the pure Kitaev spin liquid. This observation suggests 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-RuCl₃.

中文翻译：

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Kitaev 候选材料 α-RuCl3 中的半整数量化异常热霍尔效应

最近报道了二维蜂窝材料 α-RuCl _{3 的}半整数热量子霍尔电导。我们发现，即使对于没有面外分量的磁场，也会出现半整数热霍尔平台。量化热霍尔电导的测量场角变化与纯基塔耶夫自旋液体的拓扑陈数具有相同的符号结构。这一观察结果表明，即使在 α-RuCl _{3 中}存在非 Kitaev 相互作用的情况下，与局部磁矩的分级相关的非阿贝尔拓扑顺序仍然存在。