Quantum Phases of Transition Metal Dichalcogenide Moiré Systems
Quantum Phases of Transition Metal Dichalcogenide Moiré Systems
复制标题
过渡金属二硫属化物莫尔系统的量子相
DOI：
10.1103/physrevlett.128.157602
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发表时间：
2022
影响因子：
8.6
通讯作者：
Kim, Eun-Ah
中科院分区：
文献类型：
--
作者：
Zhou, Yiqing;Sheng, D. N.;Kim, Eun-Ah
云纹系统为强关联物理的研究提供了一个丰富的平台。最近关于异质双层过渡金属二硫属化物莫尔系统的实验是令人兴奋的，因为它们在三角晶格上表现出一个相对简单的扩展哈伯德模型系统。受异质过渡金属二硫属化物Moiré体系作为固态量子模拟器的前景的启发，我们利用密度矩阵重整化群研究了三角晶格上的扩展Hubbard模型.具体而言，我们探讨了扩展的Hubbard模型中的关键调整参数，即动能强度和更远范围的库仑相互作用强度所跨越的二维相空间。我们发现费米流体，手征自旋液体，自旋密度波，和电荷序之间的竞争。特别是，我们的手征相关的最佳进一步范围内的相互作用的发现提出了一个诱人的可能性。
Moiré systems provide a rich platform for studies of strong correlation physics. Recent experiments on heterobilayer transition metal dichalcogenide Moiré systems are exciting in that they manifest a relatively simple model system of an extended Hubbard model on a triangular lattice. Inspired by the prospect of the hetero-transition metal dichalcogenide Moiré system’s potential as a solid-state-based quantum simulator, we explore the extended Hubbard model on the triangular lattice using the density matrix renormalization group. Specifically, we explore the two-dimensional phase space spanned by the key tuning parameters in the extended Hubbard model, namely, the kinetic energy strength and the further-range Coulomb interaction strengths. We find competition between Fermi fluid, chiral spin liquid, spin density wave, and charge order. In particular, our finding of the optimal further-range interaction for the chiral correlation presents a tantalizing possibility.