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Data for Ghost anti-crossings caused by interlayer umklapp hybridization of bands in 2D heterostructures
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Graham, Abigail J., Zultak, Johanna, Hamer, Matthew J., Zólyomi, Viktor, Magorrian, Samuel, Barinov, Alexei, Kandyba, Viktor, Giampietri, Alessio, Locatelli, Andrea, Genuzio, Francesca, Teutsch, Natalie C., Salazar, Cuauhtémoc, Hine, Nicholas D. M., Fal'ko, Vladimir I., Gorbachev, Roman V. and Wilson, Neil R. (2020) Data for Ghost anti-crossings caused by interlayer umklapp hybridization of bands in 2D heterostructures. [Dataset]
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Data for Ghost anti-crossings caused by interlayer umklapp hybridization of bands in 2D heterostructures (2)(2).zip - Published Version Available under License Creative Commons Attribution 4.0. Download (122Mb) |
Abstract
In two-dimensional heterostructures, crystalline atomic layers with differing lattice parameters can stack directly one on another. The resultant close proximity of atomic lattices with differing periodicity can lead to new phenomena. For umklapp processes, this opens the possibility for interlayer umklapp scattering, where interactions are mediated by the transfer of momenta to or from the lattice in the neighbouring layer. Using angle-resolved photoemission spectroscopy to study a graphene on InSe heterostructure, we present evidence that interlayer umklapp processes can cause hybridization between bands from neighbouring layers in regions of the Brillouin zone where bands from only one layer are expected, despite no evidence for moir/'e-induced replica bands. This phenomenon manifests itself as 'ghost' anti-crossings in the InSe electronic dispersion. Applied to a range of suitable 2DM pairs, this phenomenon of interlayer umklapp hybridization can be used to create strong mixing of their electronic states, giving a new tool for twist-controlled band structure engineering.
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Subjects: | Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||||||||||||||||||||
Type of Data: | Experimental data | ||||||||||||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Heterostructures, Lattice theory, Solid state physics, Nanostructured materials, Photoelectron spectroscopy, Photoemission | ||||||||||||||||||||||||||||||||||||||||||
Publisher: | University of Warwick, Department of Physics | ||||||||||||||||||||||||||||||||||||||||||
Official Date: | 21 October 2020 | ||||||||||||||||||||||||||||||||||||||||||
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Status: | Not Peer Reviewed | ||||||||||||||||||||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||||||||||||||||||||
Media of Output (format): | .txt, .docx, .pdf | ||||||||||||||||||||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||||||||||||||||||||
Copyright Holders: | University of Warwick | ||||||||||||||||||||||||||||||||||||||||||
Description: | Data record consists of a zip archive, organised into subfolders according to corresponding figure in the related publication, and containing an accompanying readme file. |
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Date of first compliant deposit: | 2 November 2020 | ||||||||||||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 2 November 2020 | ||||||||||||||||||||||||||||||||||||||||||
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