论文标题
Kitaev磁铁α-Rucl3中的平面热霍尔电导率
The planar thermal Hall conductivity in the Kitaev magnet α-RuCl3
论文作者
论文摘要
我们报告了类似于Onsager的平面热厅电导率的详细测量值$κ_{xy} $ in $α$ -RUCL $ _3 $，这是一种旋转的局部利益候选者。使用热电流$ {\ bf j} _ {\ rm q} $和磁场$ \ bf b \ Parallel a $（Zigzag轴），观察到的$κ__{xy}/t $随温度$ t $（1-10 k）而变化很大。结果是由玻色丝激发刺激很好地描述的，这些激发演变为$ b $的拓扑元音。适合$κ_{xy}/t $产生Chern号$ \ sim 1 $和一个频带$ω_1\ sim $ 1 MEV，与Electron Spin-resonance实验中看到的敏锐模式一致。玻色子角色与$κ_{xy}/t $的半定量不相容。
We report detailed measurements of the Onsager-like planar thermal Hall conductivity $κ_{xy}$ in $α$-RuCl$_3$, a spin-liquid candidate of topical interest. With the thermal current ${\bf J}_{\rm Q}$ and magnetic field $\bf B\parallel a$ (zigzag axis), the observed $κ_{xy}/T$ varies strongly with temperature $T$ (1-10 K). The results are well-described by bosonic edge excitations which evolve to topological magnons at large $B$. Fits to $κ_{xy}/T$ yield a Chern number $\sim 1$ and a band energy $ω_1\sim$1 meV, in agreement with sharp modes seen in electron spin-resonance experiments. The bosonic character is incompatible with half-quantization of $κ_{xy}/T$.
