Evidence for Moire Trions in Twisted MoSe2 Homobilayers
Evidence for Moire Trions in Twisted MoSe2 Homobilayers
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DOI：
10.1021/acs.nanolett.1c01207
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发表时间：
2021-05-10
期刊：
影响因子：
10.8
通讯作者：
Xiong, Qihua
中科院分区：
文献类型：
--
作者：
Marcellina, Elizabeth;Liu, Xue;Xiong, Qihua
范德华结构的云纹超晶格为设计能带结构和量子态提供了一个强大的平台。例如，魔角扭曲双层石墨烯和ABC三层石墨烯中的莫尔超晶格具有关联的绝缘态和超导态，而在过渡金属二卤化物(TMD)扭曲双层膜中，已发现莫尔激子。这里我们证明了莫尔超晶格对能带结构的影响是普遍的：在TMD扭曲的双层膜中，激子和激子复合体可以像光学晶格中的超冷玻色子或费米子原子一样被捕获到超晶格中。以扭曲的MoSe_2同质双分子膜为模型系统，给出了莫尔三重离子存在的证据。因此，我们的结果为设计范德华结构提供了可能性，这些结构拥有费米子或玻色子准粒子阵列，可以用来实现对量子模拟和量子信息处理至关重要的可调多体态。
Moire superlattices of van der Waals structures offer a powerful platform for engineering band structure and quantum states. For instance, Moire superlattices in magic-angle twisted bilayer graphene, ABC trilayer graphene have been shown to harbor correlated insulating and superconducting states, while in transition metal dichalcogenide (TMD) twisted bilayers, Moire excitons have been identified. Here we show that the effects of a Moire superlattice on the band structure are general: In TMD twisted bilayers, excitons and exciton complexes can be trapped in the superlattice in a manner analogous to ultracold bosonic or Fermionic atoms in optical lattices. Using twisted MoSe2 homobilayers as a model system, we present evidence for Moire trions. Our results thus open possibilities for designer van der Waals structures hosting arrays of Fermionic or bosonic quasiparticles, which can be used to realize tunable many-body states crucial for quantum simulation and quantum information processing.