论文标题
3 $ d $ cobalt kitaev系统中的重要热厅效应$ na_2co_2teo_6 $
Significant thermal Hall effect in the 3$d$ cobalt Kitaev system $Na_2Co_2TeO_6$
论文作者
论文摘要
Kitaev Physics最近因其预期的新型量子旋转液态而引起了凝结物质的关注。热运输测量对于探测电荷中性准粒子的新特征至关重要。在这封信中，我们报告了$ Na_2co_2teo_6 $（NCTO）的明显热厅效应，这是一种kitaev量子旋转液体候选者，当沿蜂窝平面的平面外方向施加磁场时。 NCTO中的热导率（$κ__{xx} $）和热门电导率（$κ__{xy} $）在Neel温度（$ t_n $）的下方揭示了不同的磁场依赖性（$ t_n $）的27 k。 $ t^*$ = 150 k。另一方面，$κ_{xx} $和$κ_{xy} $显示出$ t <t_n $的复杂字段依赖性。
Kitaev physics has recently attracted attention in condensed matter for its anticipated novel quantum spin liquid state. The thermal transport measurement is crucial for probing the novel features of charge-neutral quasiparticles. In this letter, we report a significant thermal Hall effect in $Na_2Co_2TeO_6$ (NCTO), a Kitaev quantum spin liquid candidate, when the magnetic field is applied along the out-of-plane direction of the honeycomb plane. The thermal conductivity ($κ_{xx}$) and thermal Hall conductivity ($κ_{xy}$) in NCTO reveal distinct magnetic field dependences below and above the Neel temperature ($T_N$) of 27 K. For $T>T_N$, $κ_{xx}$ has a monotonic decrease in the field dependence, while $κ_{xy}$ persists up to $T^*$ = 150 K. On the other hand, both $κ_{xx}$ and $κ_{xy}$ exhibit complex field dependence for $T<T_N$.
