Surface structure promoted high-yield growth and magnetotransport properties of Bi2Se3 nanoribbons
Artikel i vetenskaplig tidskrift, 2019

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.


Gunta Kunakova

Latvijas Universitate

Raimonds Meija

Latvijas Universitate

Jana Andzane

Latvijas Universitate

Uldis Malinovskis

Latvijas Universitate

Gvido Petersons

Latvijas Universitate

Margarita Baitimirova

Latvijas Universitate

Mikhael Bechelany

Université de Montpellier

Thilo Bauch

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Donats Erts

Latvijas Universitate

Scientific Reports

2045-2322 (ISSN)

Vol. 9 1 11328

High Frequency Topological Insulator devices for Metrology (HiTIMe)

Europeiska kommissionen (Horisont 2020), 2018-02-01 -- 2022-01-31.


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