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Anderson–Kitaev spin liquid
npj Quantum Materials ( IF 5.4 ) Pub Date : 2020-11-06 , DOI: 10.1038/s41535-020-00285-3
Masahiko G. Yamada

The bond-disordered Kitaev model attracts much attention due to the experimental relevance in α-RuCl3 and A3LiIr2O6 (A = H, D, Ag, etc.). Applying a magnetic field to break the time-reversal symmetry leads to a strong modulation in mass terms for Dirac cones. Because of the smallness of the flux gap of the Kitaev model, a small bond disorder can have large influence on itinerant Majorana fermions. The quantization of the thermal Hall conductivity κxy/T disappears by a quantum Hall transition induced by a small disorder, and κxy/T shows a rapid crossover into a state with a negligible Hall current. We call this immobile liquid state Anderson–Kitaev spin liquid (AKSL). Especially, the critical disorder strength δJc1 ~ 0.05 in the unit of the Kitaev interaction would have many implications for the stability of Kitaev spin liquids.



中文翻译:

安德森-基塔耶夫纺丝液

由于在α- RuCl 3A 3 LiIr 2 O 6A = H,D,Ag等)中的实验相关性,无序的Kitaev模型引起了很多关注。施加磁场以破坏时间反转对称性会导致Dirac锥的质量调制变强。由于Kitaev模型的通量间隙较小,因此小的键合紊乱可能会对流动的Majorana费米子产生较大影响。热霍尔的量化电导率κ X ý / Ť通过一个小障碍引起的量子霍尔过渡消失,并且κ X ÿ / Ť显示了快速过渡到霍尔电流可忽略不计的状态。我们称这种不流动的液态安德森-基塔耶夫旋转液(AKSL)。特别是,临界病症强度δ Ĵ C1在Kitaev相互作用的单元〜0.05会对的Kitaev自旋液体的稳定性的许多问题。

更新日期:2020-11-06
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