Polar and quasicrystal vortex observed in twisted-bilayer molybdenum disulfide
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Pages (from-to) | 198-205 |
Journal / Publication | Science |
Volume | 386 |
Issue number | 6718 |
Online published | 10 Oct 2024 |
Publication status | Published - 11 Oct 2024 |
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Abstract
We report the observation of an electric field in twisted-bilayer molybdenum disulfide (MoS2) and elucidate its correlation with local polar domains using four-dimensional scanning transmission electron microscopy (4D-STEM) and first-principles calculations. We reveal the emergence of in-plane topological vortices within the periodic moiré patterns for both commensurate structures at small twist angles and the incommensurate quasicrystal structure that occurs at a 30° twist. The large-angle twist leads to mosaic chiral vortex patterns with tunable characteristics. A twisted quasicrystal bilayer, characterized by its 12-fold rotational symmetry, hosts complex vortex patterns and can be manipulated by picometer-scale interlayer displacement. Our findings highlight that twisting 2D bilayers is a versatile strategy for tailoring local electric polar vortices. © 2024 the authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.
Citation Format(s)
Polar and quasicrystal vortex observed in twisted-bilayer molybdenum disulfide. / Tsang, Chi Shing; Zheng, Xiaodong; Yang, Tong et al.
In: Science, Vol. 386, No. 6718, 11.10.2024, p. 198-205.
In: Science, Vol. 386, No. 6718, 11.10.2024, p. 198-205.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review