论文标题
旋转1 Kitaev Honeycomb模型中的野外驱动无间隙自旋液体
Field-Driven Gapless Spin Liquid in the Spin-1 Kitaev Honeycomb Model
论文作者
论文摘要
最新的Spin-1 Kitaev材料的建议，例如具有BI和SB元素的蜂窝状Ni氧化物，表明这些化合物自然会引起抗铁磁（AFM）Kitaev耦合。观察到AFM Spin-1/2 Kitaev模型中的中间场强度的过渡到中间场强度的过渡，已经引起了这种AFM Kitaev系统的概念兴趣。然而，迄今已知的所有自旋1/2吉塔维材料均表现出铁磁粘合方向交换。在这里，我们在磁场中讨论了Spin-1 Kitaev模型的物理学，并通过广泛的数值分析表明，对于AFM耦合，它在中间场强度显示出扩展的无间隙量子自旋液体。与自旋1/2对应物的近似类比表明，这种无间隙的自旋液体是$ u（1）$旋转液体，具有中性的费米表面，这会导致增强的热运输特征。
Recent proposals for spin-1 Kitaev materials, such as honeycomb Ni oxides with heavy elements of Bi and Sb, have shown that these compounds naturally give rise to antiferromagnetic (AFM) Kitaev couplings. Conceptual interest in such AFM Kitaev systems has been sparked by the observation of a transition to a gapless $U(1)$ spin liquid at intermediate field strengths in the AFM spin-1/2 Kitaev model. However, all hitherto known spin-1/2 Kitaev materials exhibit ferromagnetic bond-directional exchanges. Here we discuss the physics of the spin-1 Kitaev model in a magnetic field and show, by extensive numerical analysis, that for AFM couplings it exhibits an extended gapless quantum spin liquid at intermediate field strengths. The close analogy to its spin-1/2 counterpart suggests that this gapless spin liquid is a $U(1)$ spin liquid with a neutral Fermi surface, that gives rise to enhanced thermal transport signatures.
