论文标题
从扭曲的双层MOS2中的破坏性干扰中实现具有强轨道各向异性的几乎无散带
Realization of Nearly Dispersionless Bands with Strong Orbital Anisotropy from Destructive Interference in Twisted Bilayer MoS2
论文作者
论文摘要
最近，以二维异质结构以受控的方式以二维异质结构作为一种新旋钮出现了堆叠的范德华材料之间的扭曲角，从而引起了超导性或相关的绝缘状态。在这里，我们使用基于AB的方法来表征扭曲的双层MOS2的电子特性。我们报告说，与扭曲的双层石墨烯形成鲜明对比的是，略带孔的MOS2在蜂窝晶状体上实现了强烈的不对称的PX-PY Hubbard模型，由于破坏性干扰而出现了两个几乎完全分散的频段。我们研究了在存在相互作用的情况下扭曲的双层MOS2的集体行为，并表征了一系列不同的磁性和轨道有序的相关相，这可能会易受量子波动的影响，从而引起异国情调，纯粹的量子状态。
Recently, the twist angle between adjacent sheets of stacked van der Waals materials emerged as a new knob to engineer correlated states of matter in two-dimensional heterostructures in a controlled manner, giving rise to emergent phenomena such as superconductivity or correlated insulating states. Here,we use an ab initio based approach to characterize the electronic properties of twisted bilayer MoS2. We report that, in marked contrast to twisted bilayer graphene, slightly hole-doped MoS2 realizes a strongly asymmetric px-py Hubbard model on the honeycomb lattice, with two almost entirely dispersionless bands emerging due to destructive interference. We study the collective behavior of twisted bilayer MoS2 in the presence of interactions, and characterize an array of different magnetic and orbitally-ordered correlated phases,which may be susceptible to quantum fluctuations giving rise to exotic, purely quantum, states of matter.
