One-Interlayer-Twisted Multilayer MoS2 Moiré Superlattices

Weifeng Zhang; He Hao; Yangjin Lee; Yan Zhao; Lianming Tong; Kwanpyo Kim; Nan Liu

doi:10.1002/adfm.202111529

One-Interlayer-Twisted Multilayer MoS₂ Moiré Superlattices

Weifeng Zhang, He Hao, Yangjin Lee, Yan Zhao, Lianming Tong, Kwanpyo Kim, Nan Liu

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Twist angle provides a new degree of freedom for 2D material modifications. In principle, the intrinsic properties of twisted multilayers can be regulated by twist angle between each adjacent layer and thus have greater tunability than widely studied bilayer structures. Considering its complexity, it is important to first investigate the simplest twisted multilayers with only one interface twisted. In this work, multilayer Moiré superlattices with only one twisted interface via paraffin-assisted folding of non-twisted stacked (highly symmetrically stacked) multilayer MoS₂ are successfully fabricated, and their twist-angle dependent optical properties are systematically studied. Compared to non-twisted stacked multilayer MoS₂, the one-interface-twisted multilayers show a 2–3.5 times higher PL intensity, and their interlayer coupling, indirect bandgap, and degree of circular polarization (DOCP) are tunable by twist angle. Notably, the DOCP for the one-interface-twisted four-layer (folded bilayer) can reach 86%, which is the highest value ever reported for transition metal dichalcogenide homostructures above liquid nitrogen temperature. This work provides a solid base for understanding twist-angle dependent properties of twisted multilayer 2D-materials.

Original language	English
Article number	2111529
Journal	Advanced Functional Materials
Volume	32
Issue number	19
DOIs	https://doi.org/10.1002/adfm.202111529
Publication status	Published - 2022 May 9

Bibliographical note

Funding Information:
W.Z. and H.H. contributed equally to this work. This work was supported by National Natural Science Foundation of China (21903007, 22072006), Young Thousand Talents Program (110532103), Beijing Normal University Startup funding (312232102), Beijing Municipal Science & Technology Commission (No. Z191100000819002), and the Fundamental Research Funds for the Central Universities (310421109). Y.L. and K.K. acknowledge support from the Basic Science Research Program at the National Research Foundation of Korea (NRF-2019R1C1C1003643 and NRF-2021R1C1C2006785).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1002/adfm.202111529

Cite this

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title = "One-Interlayer-Twisted Multilayer MoS2 Moir{\'e} Superlattices",

abstract = "Twist angle provides a new degree of freedom for 2D material modifications. In principle, the intrinsic properties of twisted multilayers can be regulated by twist angle between each adjacent layer and thus have greater tunability than widely studied bilayer structures. Considering its complexity, it is important to first investigate the simplest twisted multilayers with only one interface twisted. In this work, multilayer Moir{\'e} superlattices with only one twisted interface via paraffin-assisted folding of non-twisted stacked (highly symmetrically stacked) multilayer MoS2 are successfully fabricated, and their twist-angle dependent optical properties are systematically studied. Compared to non-twisted stacked multilayer MoS2, the one-interface-twisted multilayers show a 2–3.5 times higher PL intensity, and their interlayer coupling, indirect bandgap, and degree of circular polarization (DOCP) are tunable by twist angle. Notably, the DOCP for the one-interface-twisted four-layer (folded bilayer) can reach 86%, which is the highest value ever reported for transition metal dichalcogenide homostructures above liquid nitrogen temperature. This work provides a solid base for understanding twist-angle dependent properties of twisted multilayer 2D-materials.",

author = "Weifeng Zhang and He Hao and Yangjin Lee and Yan Zhao and Lianming Tong and Kwanpyo Kim and Nan Liu",

note = "Funding Information: W.Z. and H.H. contributed equally to this work. This work was supported by National Natural Science Foundation of China (21903007, 22072006), Young Thousand Talents Program (110532103), Beijing Normal University Startup funding (312232102), Beijing Municipal Science & Technology Commission (No. Z191100000819002), and the Fundamental Research Funds for the Central Universities (310421109). Y.L. and K.K. acknowledge support from the Basic Science Research Program at the National Research Foundation of Korea (NRF-2019R1C1C1003643 and NRF-2021R1C1C2006785). Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

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AU - Kim, Kwanpyo

AU - Liu, Nan

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N2 - Twist angle provides a new degree of freedom for 2D material modifications. In principle, the intrinsic properties of twisted multilayers can be regulated by twist angle between each adjacent layer and thus have greater tunability than widely studied bilayer structures. Considering its complexity, it is important to first investigate the simplest twisted multilayers with only one interface twisted. In this work, multilayer Moiré superlattices with only one twisted interface via paraffin-assisted folding of non-twisted stacked (highly symmetrically stacked) multilayer MoS2 are successfully fabricated, and their twist-angle dependent optical properties are systematically studied. Compared to non-twisted stacked multilayer MoS2, the one-interface-twisted multilayers show a 2–3.5 times higher PL intensity, and their interlayer coupling, indirect bandgap, and degree of circular polarization (DOCP) are tunable by twist angle. Notably, the DOCP for the one-interface-twisted four-layer (folded bilayer) can reach 86%, which is the highest value ever reported for transition metal dichalcogenide homostructures above liquid nitrogen temperature. This work provides a solid base for understanding twist-angle dependent properties of twisted multilayer 2D-materials.

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