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Multi-purpose Black-Phosphorus/hBN heterostructures
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Constantinescu, Gabriel C. and Hine, Nicholas (2016) Multi-purpose Black-Phosphorus/hBN heterostructures. Nano Letters, 16 (4). pp. 2586-2594. doi:10.1021/acs.nanolett.6b00154 ISSN 1530-6984.
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Official URL: http://dx.doi.org/10.1021/acs.nanolett.6b00154
Abstract
Black phosphorus (BP) has recently emerged as a promising semiconducting two-dimensional material. However, its viability is threatened by its instability in ambient conditions, and by the significant decrease of its band gap in multilayers. We show that one could solve all the aforementioned problems by interfacing BP with hexagonal boron nitride (hBN). To this end, we simulate large, rotated hBN/BP interfaces using linear-scaling density functional theory (DFT). We predict that hBN-encapsulation preserves the main electronic properties of the BP monolayer, while hBN spacers can be used to counteract the band gap reduction in stacked BP. Finally, we propose a model for a tunneling field effect transistor (TFET) based on hBN-spaced BP bilayers. Such BP TFETs would sustain both low-power and fast-switching operations, including negative differential resistance behaviour with peak-to-valley ratios of the same order of magnitude as those encountered in transition metal dichalcogenide TFETs.
Item Type: | Journal Article | ||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Library of Congress Subject Headings (LCSH): | Phosphorus -- Electric properties, Semiconductors, Density functionals, Heterostructures | ||||||||||
Journal or Publication Title: | Nano Letters | ||||||||||
Publisher: | American Chemical Society | ||||||||||
ISSN: | 1530-6984 | ||||||||||
Official Date: | 13 April 2016 | ||||||||||
Dates: |
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Volume: | 16 | ||||||||||
Number: | 4 | ||||||||||
Page Range: | pp. 2586-2594 | ||||||||||
DOI: | 10.1021/acs.nanolett.6b00154 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 5 April 2016 | ||||||||||
Date of first compliant Open Access: | 30 March 2017 | ||||||||||
Funder: | Cambridge Trust European Scholarship |
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