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Ultra-thin van der Waals crystals as semiconductor quantum wells
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Zultak, Johanna, Magorrian, Samuel J., Koperski, Maciej, Garner, Alistair, Hamer, Matthew J., Tóvári, Endre, Novoselov, Kostya S., Zhukov, Alexander A., Zou, Yichao, Wilson, Neil R., Haigh, Sarah J., Kretinin, Andrey V., Fal’ko, Vladimir I. and Gorbachev, Roman V. (2020) Ultra-thin van der Waals crystals as semiconductor quantum wells. Nature Communications, 11 (1). 125. doi:10.1038/s41467-019-13893-w ISSN 2041-1723.
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Official URL: http://dx.doi.org/10.1038/s41467-019-13893-w
Abstract
Control over the quantization of electrons in quantum wells is at the heart of the functioning of modern advanced electronics; high electron mobility transistors, semiconductor and Capasso terahertz lasers, and many others. However, this avenue has not been explored in the case of 2D materials. Here we apply this concept to van der Waals heterostructures using the thickness of exfoliated crystals to control the quantum well dimensions in few-layer semiconductor InSe. This approach realizes precise control over the energy of the subbands and their uniformity guarantees extremely high quality electronic transport in these systems. Using tunnelling and light emitting devices, we reveal the full subband structure by studying resonance features in the tunnelling current, photoabsorption and light emission spectra. In the future, these systems could enable development of elementary blocks for atomically thin infrared and THz light sources based on intersubband optical transitions in few-layer van der Waals materials.
Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||||||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Quasimolecules, Van der Waals forces, Semiconductors -- Materials, Quantum wells | ||||||||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Nature Communications | ||||||||||||||||||||||||||||||||||||||||||
Publisher: | Nature Publishing Group | ||||||||||||||||||||||||||||||||||||||||||
ISSN: | 2041-1723 | ||||||||||||||||||||||||||||||||||||||||||
Official Date: | 8 January 2020 | ||||||||||||||||||||||||||||||||||||||||||
Dates: |
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Volume: | 11 | ||||||||||||||||||||||||||||||||||||||||||
Number: | 1 | ||||||||||||||||||||||||||||||||||||||||||
Article Number: | 125 | ||||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1038/s41467-019-13893-w | ||||||||||||||||||||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||||||||||||||||||||
Date of first compliant deposit: | 5 February 2020 | ||||||||||||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 20 February 2020 | ||||||||||||||||||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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