论文标题
扭曲的过渡金属二分法中的异常大厅金属和分数Chern绝缘子
Anomalous Hall metal and fractional Chern insulator in twisted transition metal dichalcogenides
论文作者
论文摘要
我们预测在扭曲过渡金属二核代源的金属阶段中库仑相互作用驱动的强大的iSing铁磁性，用于一系列小扭曲角度。由于存在自旋谷锁定和Chern带，因此完全自旋极化状态（半金属）具有旋转间隙，并表现出异常的大厅效应。我们还发现，在一个魔法角度，预计Chern带的平坦，$ 1/3 $填充的异常大厅金属可能在低温下变得不稳定，至$ \ sqrt {3} \ times \ sqrt {3} $电荷密度波或分数Chern iNsulutator。
We predict robust Ising ferromagnetism driven by Coulomb interaction in the metallic phase of twisted transition metal dichalcogenides homobilayers for a range of small twist angles. Due to the presence of spin-valley locking and Chern band, the completely spin polarized state -- a half metal -- has a spin gap and exhibits anomalous Hall effect. We also find that near a magic angle where the Chern band is predicted to be exceptionally flat, the anomalous Hall metal at $1/3$ filling may become unstable at low temperature to a $\sqrt{3}\times\sqrt{3}$ charge density wave, or a fractional Chern insulator.
