论文标题
在高磁场下，可能的中间量子旋转液相在$α$ -rucl $ _3 $最多100 t下
Possible Intermediate Quantum Spin Liquid Phase in $α$-RuCl$_3$ under High Magnetic Fields up to 100 T
论文作者
论文摘要
在Kitaev材料中追求异国风情的量子液体（QSL）状态$α$ -rucl $ _3 $最近引起了极大的研究兴趣。一个有趣的问题是该化合物中可能存在场诱导的QSL相。在这里，我们对使用非破坏性和破坏性的脉冲磁体进行了$α$ -rucl $ _3 $ $α$ -rucl $ _3 $的磁化过程的高场测量。在沿C $^*$轴的平面外部（即垂直于蜂窝平面）下，分别在36 T和约83 t的情况下分别发现了两个量子相变，在其中中间相位作为预测的QSL。通过用从C $^*$轴倾斜到$ 90^\ Circ $（即平面方向）的字段测量磁化数据，我们获得了包含Zigzag，progaragnetic和QSL相的场角相图。基于准确的$ k $ - $ j $ - $γ$ - $γ^{\ prime} $ $α$ -rucl $ _3 $的型号，我们执行密度矩阵重质化组模拟，并以与实验达成极好的一致性重现量子相图。
Pursuing the exotic quantum spin liquid (QSL) state in the Kitaev material $α$-RuCl$_3$ has intrigued great research interest recently. A fascinating question is on the possible existence of field-induced QSL phase in this compound. Here we perform a high-field measurement of the magnetization process of $α$-RuCl$_3$ up to 102 T employing the non-destructive and destructive pulsed magnets. Under the out-of-plane field along the c$^*$ axis (i.e., perpendicular to the honeycomb plane), two quantum phase transitions are uncovered at respectively 36 T and about 83 T, between which there lies an intermediate phase as the predicted QSL. By measuring the magnetization data with fields tilted from the c$^*$ axis up to $90^\circ$ (i.e., in-plane direction), we obtain the field-angle phase diagram that contains the zigzag, paramagnetic, and QSL phases. Based on the accurate $K$-$J$-$Γ$-$Γ^{\prime}$ model of $α$-RuCl$_3$, we perform density matrix renormalization group simulations and reproduce the quantum phase diagram in excellent agreement with experiments.
