论文标题
基塔夫候选人中量化的半数量化热厅效应的样本依赖性$α$ -rucl $ _3 $
Sample dependence of the half-integer quantized thermal Hall effect in the Kitaev candidate $α$-RuCl$_3$
论文作者
论文摘要
我们已经调查了在$ c $ axis到$ a $ a axis的磁场下，在$α$ -rucl $ _3 $下，半级式热厅效应的样品依赖性在$α$ -rucl $ _3 $下。我们发现，具有最大的纵向热导率的样品（$κ_{xx} $）显示了基塔伊夫模型中预期的半数量化热室效应。另一方面，在较小的$κ_{xx} $的样品中未观察到量化的热厅效应。我们建议，抑制对声子热传导的磁散射效应，从而拓宽了保护Majorana fermions手性边缘电流的场诱导的间隙，这对于观察量化的热厅效应很重要。
We have investigated the sample dependence of the half-integer thermal Hall effect in $α$-RuCl$_3$ under a magnetic field tilted 45 degree from the $c$ axis to the $a$ axis. We find that the sample with the largest longitudinal thermal conductivity ($κ_{xx}$) shows the half-integer quantized thermal Hall effect expected in the Kitaev model. On the other hand, the quantized thermal Hall effect was not observed in the samples with smaller $κ_{xx}$. We suggest that suppressing the magnetic scattering effects on the phonon thermal conduction, which broaden the field-induced gap protecting the chiral edge current of the Majorana fermions, is important to observe the quantized thermal Hall effect.
