论文标题
在自旋-1/2蜂窝磁铁Na2Co2Teo6中田间诱导的量子自旋疾病状态
Field-induced quantum spin disordered state in spin-1/2 honeycomb magnet Na2Co2TeO6
论文作者
论文摘要
自旋轨道耦合的蜂窝磁铁与基塔夫相互作用受到了很多关注，因为它们的潜力托管了包括量子自旋液体在内的外来量子状态。到目前为止，研究最多的Kitaev系统是基于4D/5D的蜂窝磁铁。最近的理论研究预测，包括Na2Co2Teo6（NCTO）在内的3D基蜂窝磁铁也可能是一个潜在的Kitaev系统。在这里，我们使用了热容量，磁化，电子自旋谐振测量以及非弹性中子散射（INS）的组合来研究NCTO的量子磁性，并且在7.5 t <b（垂直到b-axis）<10.5 t的应用磁场范围内，我们发现了野外诱导的自旋磁失调状态。作为在有效的Spin-1/2蜂窝晶状体上具有场诱导无序状态的3D-MAGNET，NCTO将Kitaev模型扩展到3D化合物，从而促进了对量子磁体中自旋轨道效应的进一步兴趣。
Spin-orbit coupled honeycomb magnets with the Kitaev interaction have received a lot of attention due to their potential of hosting exotic quantum states including quantum spin liquids. Thus far, the most studied Kitaev systems are 4d/5d-based honeycomb magnets. Recent theoretical studies predicted that 3d-based honeycomb magnets, including Na2Co2TeO6 (NCTO), could also be a potential Kitaev system. Here, we have used a combination of heat capacity, magnetization, electron spin resonance measurements alongside inelastic neutron scattering (INS) to study NCTO's quantum magnetism, and we have found a field-induced spin disordered state in an applied magnetic field range of 7.5 T < B (vertical to b-axis) < 10.5 T. The INS spectra were also simulated to tentatively extract the exchange interactions. As a 3d-magnet with a field-induced disordered state on an effective spin-1/2 honeycomb lattice, NCTO expands the Kitaev model to 3d compounds, promoting further interests on the spin-orbital effect in quantum magnets.
