Surface structure promoted high-yield growth and magnetotransport properties of Bi2Se3 nanoribbons
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2019-12-01
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Abstract
In the present work, a catalyst-free physical vapour deposition method is used to synthesize high yield of Bi2Se3 nanoribbons. By replacing standard glass or quartz substrates with aluminium covered with ultrathin porous anodized aluminium oxide (AAO), the number of synthesized nanoribbons per unit area can be increased by 20–100 times. The mechanisms of formation and yield of the nanoribbons synthesized on AAO substrates having different arrangement and size of pores are analysed and discussed. It is shown that the yield and average length of the nanoribbons can base tuned by adjustment of the synthesis parameters. Analysis of magnetotransport measurements for the individual Bi2Se3 nanoribbons transferred on a Si/SiO2 substrate show the presence of three different populations of charge carriers, originating from the Dirac surface states, bulk carriers and carriers from a trivial 2DEG from an accumulation layer at the Bi2Se3 nanoribbon interface with the substrate.
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Funding Information: This work was supported by European Regional Development Fund project No. 1.1.1.1/16/A/256 and European Union’s Horizon 2020 research and innovation programme (grant agreement No. 766714/HiTIMe). GK acknowledges European Regional Development Fund project application No 1.1.1.2/VIAA/1/16/198. Publisher Copyright: © 2019, The Author(s).
Keywords
1.3 Physical sciences, 1.1. Scientific article indexed in Web of Science and/or Scopus database, General
Citation
Kunakova, G, Meija, R, Andzane, J, Malinovskis, U, Petersons, G, Baitimirova, M, Bechelany, M, Bauch, T, Lombardi, F & Erts, D 2019, 'Surface structure promoted high-yield growth and magnetotransport properties of Bi 2 Se 3 nanoribbons', Scientific Reports, vol. 9, no. 1, 11328. https://doi.org/10.1038/s41598-019-47547-0