论文标题
量子自旋液体的隧道光谱
Tunneling spectroscopy of quantum spin liquids
论文作者
论文摘要
我们在许多实验相关的几何形状中检查了通过Kitaev量子旋转液体（QSL）屏障的隧穿的光谱特征。我们结合了来自弹性和非弹性隧道过程的贡献，发现巡回旋转模式的自旋叉散射产生了对隧道电导频谱的敏捷贡献。我们解决了将候选材料$α$ -rucl $ _3 $驱动到QSL阶段所需的磁场中出现的光谱修改，我们建议在此制度中使用横向1D隧道交界处作为可行的设置。特征性旋转隙是分数化QSL激发的明确标志，将其与磁子或声子区分开。我们的分析结果通常适用于多种拓扑QSL系统。
We examine the spectroscopic signatures of tunneling through a Kitaev quantum spin liquid (QSL) barrier in a number of experimentally relevant geometries. We combine contributions from elastic and inelastic tunneling processes and find that spin-flip scattering at the itinerant spinon modes gives rise to a gaped contribution to the tunneling conductance spectrum. We address the spectral modifications that arise in a magnetic field necessary to drive the candidate material $α$-RuCl$_3$ into a QSL phase, and we propose a lateral 1D tunnel junction as a viable setup in this regime. The characteristic spin gap is an unambiguous signature of the fractionalized QSL excitations, distinguishing it from magnons or phonons. The results of our analysis are generically applicable to a wide variety of topological QSL systems.
