标题： 电荷转移自旋极化子和弱掺杂AB堆叠的TMD异质结中的铁磁性 显示英文标题

标题： Charge transfer spin-polarons and ferromagnetism in weakly doped AB-stacked TMD heterobilayers

摘要： 我们研究了在“重费米子”极限下，弱掺杂的异质双层过渡金属二硫属化物中铁磁和磁极化子态的形成，在此极限下，一层承载密集的局域磁矩，另一层承载低密度的巡游空穴。 我们表明巡游层中的载流子相互作用会诱导铁磁交换作用。 我们表征了基态，发现由载流子浓度和层间交换控制，在巡游载流子在局域磁矩背景中的层解耦相、完全极化的铁磁体和倾斜反铁磁体之间存在竞争。 在倾斜反铁磁体相中，面内120$^{\circ}$Néel序与Ising自旋轨道耦合的结合导致电子波函数的缠绕，从而产生拓扑非平凡的自旋结构和可观察到的反常霍尔效应。 在较高的载流子密度下，铁磁有序相转变为顺磁重费米液体态。 该理论使我们能够全面理解现有的实验观测结果，同时也做出了预测，包括能够直接用扫描隧道显微镜成像自旋极化子束缚态的实验特征。 我们的工作表明，在异质双层过渡金属二硫属化物的低掺杂区域，重费米子金属的（Doniach）相图的基本范式被根本性地修改了。 显示英文摘要

摘要： We study the formation of ferromagnetic and magnetic polaron states in weakly doped heterobilayer transition metal dichalcogenides in the ``heavy fermion'' limit in which one layer hosts a dense set of local moments and the other hosts a low density of itinerant holes. We show that interactions among the carriers in the itinerant layer induces a ferromagnetic exchange. We characterize the ground state finding a competition, controlled by the carrier concentration and interlayer exchange, between a layer decoupled phase of itinerant carriers in a background of local moments, a fully polarized ferromagnet and a canted antiferromagnet. In the canted antiferromagnet phase the combination of the in-plane 120$^{\circ}$ N\'eel order and Ising spin orbit couplings induces winding in the electronic wavefunction giving rise to a topologically non-trivial spin texture and an observable anomalous Hall effect. At larger carrier density the ferromagnetically ordered phase transitions into a paramagnetic heavy Fermi liquid state. This theory enables a comprehensive understanding of the existing experimental observations while also making predictions including experimental signatures enabling direct imaging of spin polaron bound states with scanning tunneling microscopy. Our work shows that the prevailing paradigm of the (Doniach) phase diagram of heavy fermion metals is fundamentally modified in the low doping regime of heterobilayer transition metal dichalcogenides.