Anisotropic moiré optical transitions in twisted monolayer/bilayer phosphorene heterostructures

Shilong Zhao, Erqing Wang, Ebru Alime Üzer, Shuaifei Guo, Ruishi Qi, Junyang Tan, Kenji Watanabe, Takashi Taniguchi, Tom Nilges, Peng Gao, Yuanbo Zhang, Hui-Ming Cheng, Bilu Liu (), Xiaolong Zou () and Feng Wang ()
Additional contact information
Shilong Zhao: Tsinghua-Berkeley Shenzhen Institute, Tsinghua University
Erqing Wang: Tsinghua-Berkeley Shenzhen Institute, Tsinghua University
Ebru Alime Üzer: Technical University of Munich
Shuaifei Guo: Fudan University
Ruishi Qi: University of California at Berkeley
Junyang Tan: Tsinghua-Berkeley Shenzhen Institute, Tsinghua University
Kenji Watanabe: National Institute for Materials Science
Takashi Taniguchi: National Institute for Materials Science
Tom Nilges: Technical University of Munich
Peng Gao: Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University
Yuanbo Zhang: Fudan University
Hui-Ming Cheng: Tsinghua-Berkeley Shenzhen Institute, Tsinghua University
Bilu Liu: Tsinghua-Berkeley Shenzhen Institute, Tsinghua University
Xiaolong Zou: Tsinghua-Berkeley Shenzhen Institute, Tsinghua University
Feng Wang: University of California at Berkeley

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Moiré superlattices of van der Waals heterostructures provide a powerful way to engineer electronic structures of two-dimensional materials. Many novel quantum phenomena have emerged in graphene and transition metal dichalcogenide moiré systems. Twisted phosphorene offers another attractive system to explore moiré physics because phosphorene features an anisotropic rectangular lattice, different from isotropic hexagonal lattices previously reported. Here we report emerging anisotropic moiré optical transitions in twisted monolayer/bilayer phosphorenes. The optical resonances in phosphorene moiré superlattice depend sensitively on twist angle and are completely different from those in the constitute monolayer and bilayer phosphorene even for a twist angle as large as 19°. Our calculations reveal that the Γ-point direct bandgap and the rectangular lattice of phosphorene give rise to the remarkably strong moiré physics in large-twist-angle phosphorene heterostructures. This work highlights fresh opportunities to explore moiré physics in phosphorene and other van der Waals heterostructures with different lattice configurations.

Date: 2021
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DOI: 10.1038/s41467-021-24272-9

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