论文标题
在平面磁场中的中间磁相的近距离基塔夫系统
Proximate Kitaev system for an intermediate magnetic phase in in-plane magnetic fields
论文作者
论文摘要
在存在磁场的情况下，由近距离Kitaev系统的磁相变向$α$ -rucl $ _3 $，我们研究了最简单但必不可少的量子自旋模型，其速度最简单但基本的量子旋转模型最近（NN）Kitaev kitaev相互作用（NN）kitaev互动和其他抗磁性第三nn Nn Heisenberg互动。在两种情况下，在两种情况下，在平面内磁场均应用于NN键，与室外场相机适用于良好的实验相一致时，采用精确的对角度化和密度矩阵重量化组方法，我们证明该模型从Zigzag订单阶段到旋转偏振相的磁相过渡到旋转极化阶段。此外，我们验证了NN旋转之间的其他对称偏外$γ$相互作用和铁磁Heisenberg相互作用都可以抑制与平面内场的中间相。我们的结果为确定近距离KITEAV系统的磁相变中的相关相互作用提供了重要的线索。
Motivated by the magnetic phase transition of a proximate Kitaev system $α$-RuCl$_3$ in the presence of a magnetic field, we study the simplest but essential quantum spin model with the ferromagnetic nearest neighboring (NN) Kitaev interaction and additional antiferromagnetic third NN Heisenberg interaction. Employing both exact diagonalization and density matrix renormalization group methods, we demonstrate that the model shows the magnetic phase transition from the zigzag order phase to the spin polarized phase through an intermediate phase in both cases when an in-plane magnetic field is applied perpendicular to the NN bond direction and when an out-of-plane field is applied, in good agreement with experimental observations. Furthermore, we verify that additional symmetric off-diagonal $Γ$ interaction and ferromagnetic Heisenberg interaction between NN spins can both suppress the intermediate phase with the in-plane field. Our result gives important clues on determining relevant interactions in the field-induced magnetic phase transition of proximate Kiteav systems.
