Electrostatic moiré potential from twisted hexagonal boron nitride layers

Dong Seob Kim; Roy C. Dominguez; Rigo Mayorga-Luna; Dingyi Ye; Jacob Embley; Tixuan Tan; Yue Ni; Zhida Liu; Mitchell Ford; Frank Y. Gao; Saba Arash; Kenji Watanabe; Takashi Taniguchi; Suenne Kim; Chih Kang Shih; Keji Lai; Wang Yao; Li Yang; Xiaoqin Li; Yoichi Miyahara

doi:10.1038/s41563-023-01637-7

Electrostatic moiré potential from twisted hexagonal boron nitride layers

Dong Seob Kim, Roy C. Dominguez, Rigo Mayorga-Luna, Dingyi Ye, Jacob Embley, Tixuan Tan, Yue Ni, Zhida Liu, Mitchell Ford, Frank Y. Gao, Saba Arash, Kenji Watanabe, Takashi Taniguchi, Suenne Kim, Chih Kang Shih, Keji Lai, Wang Yao, Li Yang, Xiaoqin Li, Yoichi Miyahara

Department of Physics

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

38 Scopus citations

Abstract

Moiré superlattices host a rich variety of correlated electronic phases. However, the moiré potential is fixed by interlayer coupling, and it is dependent on the nature of carriers and valleys. In contrast, it has been predicted that twisted hexagonal boron nitride (hBN) layers can impose a periodic electrostatic potential capable of engineering the properties of adjacent functional layers. Here, we show that this potential is described by a theory of electric polarization originating from the interfacial charge redistribution, validated by its dependence on supercell sizes and distance from the twisted interfaces. This enables controllability of the potential depth and profile by controlling the twist angles between the two interfaces. Employing this approach, we further demonstrate how the electrostatic potential from a twisted hBN substrate impedes exciton diffusion in semiconductor monolayers, suggesting opportunities for engineering the properties of adjacent functional layers using the surface potential of a twisted hBN substrate.

Original language	English
Pages (from-to)	65-70
Number of pages	6
Journal	Nature Materials
Volume	23
Issue number	1
DOIs	https://doi.org/10.1038/s41563-023-01637-7
State	Published - Jan 2024

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Kim, D. S., Dominguez, R. C., Mayorga-Luna, R., Ye, D., Embley, J., Tan, T., Ni, Y., Liu, Z., Ford, M., Gao, F. Y., Arash, S., Watanabe, K., Taniguchi, T., Kim, S., Shih, C. K., Lai, K., Yao, W., Yang, L., Li, X., & Miyahara, Y. (2024). Electrostatic moiré potential from twisted hexagonal boron nitride layers. Nature Materials, 23(1), 65-70. https://doi.org/10.1038/s41563-023-01637-7

@article{fd35172327224611abf0411f1430e7b7,

title = "Electrostatic moir{\'e} potential from twisted hexagonal boron nitride layers",

abstract = "Moir{\'e} superlattices host a rich variety of correlated electronic phases. However, the moir{\'e} potential is fixed by interlayer coupling, and it is dependent on the nature of carriers and valleys. In contrast, it has been predicted that twisted hexagonal boron nitride (hBN) layers can impose a periodic electrostatic potential capable of engineering the properties of adjacent functional layers. Here, we show that this potential is described by a theory of electric polarization originating from the interfacial charge redistribution, validated by its dependence on supercell sizes and distance from the twisted interfaces. This enables controllability of the potential depth and profile by controlling the twist angles between the two interfaces. Employing this approach, we further demonstrate how the electrostatic potential from a twisted hBN substrate impedes exciton diffusion in semiconductor monolayers, suggesting opportunities for engineering the properties of adjacent functional layers using the surface potential of a twisted hBN substrate.",

author = "Kim, {Dong Seob} and Dominguez, {Roy C.} and Rigo Mayorga-Luna and Dingyi Ye and Jacob Embley and Tixuan Tan and Yue Ni and Zhida Liu and Mitchell Ford and Gao, {Frank Y.} and Saba Arash and Kenji Watanabe and Takashi Taniguchi and Suenne Kim and Shih, {Chih Kang} and Keji Lai and Wang Yao and Li Yang and Xiaoqin Li and Yoichi Miyahara",

note = "Publisher Copyright: {\textcopyright} 2023, The Author(s), under exclusive licence to Springer Nature Limited.",

year = "2024",

month = jan,

doi = "10.1038/s41563-023-01637-7",

language = "English",

volume = "23",

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Kim, DS, Dominguez, RC, Mayorga-Luna, R, Ye, D, Embley, J, Tan, T, Ni, Y, Liu, Z, Ford, M, Gao, FY, Arash, S, Watanabe, K, Taniguchi, T, Kim, S, Shih, CK, Lai, K, Yao, W, Yang, L, Li, X & Miyahara, Y 2024, 'Electrostatic moiré potential from twisted hexagonal boron nitride layers', Nature Materials, vol. 23, no. 1, pp. 65-70. https://doi.org/10.1038/s41563-023-01637-7

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T1 - Electrostatic moiré potential from twisted hexagonal boron nitride layers

AU - Kim, Dong Seob

AU - Dominguez, Roy C.

AU - Mayorga-Luna, Rigo

AU - Ye, Dingyi

AU - Embley, Jacob

AU - Tan, Tixuan

AU - Ni, Yue

AU - Liu, Zhida

AU - Ford, Mitchell

AU - Gao, Frank Y.

AU - Arash, Saba

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Kim, Suenne

AU - Shih, Chih Kang

AU - Lai, Keji

AU - Yao, Wang

AU - Yang, Li

AU - Li, Xiaoqin

AU - Miyahara, Yoichi

PY - 2024/1

Y1 - 2024/1

N2 - Moiré superlattices host a rich variety of correlated electronic phases. However, the moiré potential is fixed by interlayer coupling, and it is dependent on the nature of carriers and valleys. In contrast, it has been predicted that twisted hexagonal boron nitride (hBN) layers can impose a periodic electrostatic potential capable of engineering the properties of adjacent functional layers. Here, we show that this potential is described by a theory of electric polarization originating from the interfacial charge redistribution, validated by its dependence on supercell sizes and distance from the twisted interfaces. This enables controllability of the potential depth and profile by controlling the twist angles between the two interfaces. Employing this approach, we further demonstrate how the electrostatic potential from a twisted hBN substrate impedes exciton diffusion in semiconductor monolayers, suggesting opportunities for engineering the properties of adjacent functional layers using the surface potential of a twisted hBN substrate.

AB - Moiré superlattices host a rich variety of correlated electronic phases. However, the moiré potential is fixed by interlayer coupling, and it is dependent on the nature of carriers and valleys. In contrast, it has been predicted that twisted hexagonal boron nitride (hBN) layers can impose a periodic electrostatic potential capable of engineering the properties of adjacent functional layers. Here, we show that this potential is described by a theory of electric polarization originating from the interfacial charge redistribution, validated by its dependence on supercell sizes and distance from the twisted interfaces. This enables controllability of the potential depth and profile by controlling the twist angles between the two interfaces. Employing this approach, we further demonstrate how the electrostatic potential from a twisted hBN substrate impedes exciton diffusion in semiconductor monolayers, suggesting opportunities for engineering the properties of adjacent functional layers using the surface potential of a twisted hBN substrate.

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DO - 10.1038/s41563-023-01637-7

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SN - 1476-1122

VL - 23

SP - 65

EP - 70

JO - Nature Materials

JF - Nature Materials

IS - 1

ER -

Electrostatic moiré potential from twisted hexagonal boron nitride layers

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