论文标题
弱耦合到kitaev量子旋转液体$α$ -rucl $ _3 $中的强耦合量子关键交叉交叉
Weak-coupling to strong-coupling quantum criticality crossover in a Kitaev quantum spin liquid $α$-RuCl$_3$
论文作者
论文摘要
我们报告了一个前所未有的量子关键跨界，代表了Kitaev量子磁性材料中的两种不同的通用缩放行为$α$ -rucl $ _3 $。 $α$ -rucl $ _3 $提出了对称破坏抗铁磁序列的对称性，也呈现了量子自旋液体的远程纠缠拓扑顺序，因此可以成为新的普遍性类别的候选系统，涉及涉及本地Z $ _2 $ _2 $ _2 $ _2 $ _2 $ fluxs and Iterineranta的新通用类别。对非弹性中子散射和比热结果的理论分析表明，高能量尺度中的威尔逊 - 菲师 - 远高川型“常规”弱耦合量子临界值交叉至较重的flymion型“本地”的“局部”强耦合在低能尺度中。我们的发现提供了有关量子临界性如何在Fermion-Boson耦合拓扑系统中演变的深刻见解，并具有不同类型的解剖费米子。
We report an unprecedented quantum criticality crossover representing two different universal scaling behaviors in a Kitaev quantum magnetic material $α$-RuCl$_3$. $α$-RuCl$_3$ presents both a symmetry breaking antiferromagnetic order and a long-range entangled topological order of a quantum spin liquid, and thus could be a candidate system for a new universality class involving deconfined fractionalized excitations of the local Z$_2$ fluxes and itinerant Majorana fermions. Theoretical analyses on the inelastic neutron scattering and specific heat results demonstrate that Wilson-Fisher-Yukawa-type 'conventional' weak-coupling quantum criticality in high energy scales crosses over to heavy-fermion-type 'local' strong-coupling one in low energy scales. Our findings provide deep insight on how the quantum criticality evolves in fermion-boson coupled topological systems with different types of deconfined fermions.
