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      Moiré superlattices and related moiré excitons in twisted van der Waals heterostructures.

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          Abstract

          Recent advances in moiré superlattices and moiré excitons, such as quantum emission arrays, low-energy flat bands, and Mott insulators, have rapidly attracted attention in the fields of optoelectronics, materials, and energy research. The interlayer twist turns into a degree of freedom that alters the properties of the systems of materials, and the realization of moiré excitons also offers the feasibility of making artificial exciton crystals. Moreover, moiré excitons exhibit many exciting properties under the regulation of various external conditions, including spatial polarisation, alternating dipolar to alternating dipolar moments and gate-dependence to gate voltage dependence; all are pertinent to their applications in nano-photonics and quantum information. But the lag in theoretical development and the low-efficiency of processing technologies significantly limit the potential of moiré superlattice applications. In this review, we systematically summarise and discuss the recent progress in moiré superlattices and moiré excitons, and analyze the current challenges, and put forward relevant recommendations. There is no doubt that further research will lead to breakthroughs in their application and promote reforms and innovations in traditional solid-state physics and materials science.

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          Author and article information

          Journal
          Chem Soc Rev
          Chemical Society reviews
          Royal Society of Chemistry (RSC)
          1460-4744
          0306-0012
          Jun 08 2021
          : 50
          : 11
          Affiliations
          [1 ] School of Physics and Electronics, Hunan Key Laboratory for Super-microstructure and Ultrafast Process, Central South University, 932 South Lushan Road, Changsha, Hunan 410083, People's Republic of China. liuyanping@csu.edu.cn.
          Article
          10.1039/d0cs01002b
          33942837
          6c126a3f-fe70-435d-acbe-52e8f3fb2d62
          History

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