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Bulk-free topologic...
Bulk-free topological insulator Bi2Se3 nanoribbons with magnetotransport signatures of Dirac surface states
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- Kunakova, Gunta (author)
- Latvijas Universitate,University of Latvia
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- galletti, luca, 1986 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Charpentier, Sophie, 1983 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andzane, J. (author)
- Latvijas Universitate,University of Latvia
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- Érts, Donats (author)
- Latvijas Universitate,University of Latvia
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- Léonard, François (author)
- Sandia National Laboratories
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- Spataru, Catalin D. (author)
- Sandia National Laboratories
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- Bauch, Thilo, 1972 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lombardi, Floriana, 1967 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2018
- 2018
- English.
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In: Nanoscale. - : Royal Society of Chemistry (RSC). - 2040-3372 .- 2040-3364. ; 10:41, s. 19595-19602
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Abstract
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- © 2018 The Royal Society of Chemistry. Many applications of topological insulators (TIs) as well as new phenomena require devices with reduced dimensions. While much progress has been made to realize thin films of TIs with low bulk carrier densities, nanostructures have not yet been reported with similar properties, despite the fact that reduced dimensions should help diminish the contributions from bulk carriers. Here we demonstrate that Bi2Se3 nanoribbons, grown by a simple catalyst-free physical-vapour deposition, have inherently low bulk carrier densities, and can be further made bulk-free by thickness reduction, thus revealing the high mobility topological surface states. Magnetotransport and Hall conductance measurements, in single nanoribbons, show that at thicknesses below 30 nm, the bulk transport is completely suppressed which is supported by self-consistent band-bending calculations. The results highlight the importance of material growth and geometrical confinement to properly exploit the unique properties of topological surface states.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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Kunakova, Gunta
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galletti, luca, ...
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Charpentier, Sop ...
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Andzane, J.
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Érts, Donats
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Léonard, Françoi ...
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Spataru, Catalin ...
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Bauch, Thilo, 19 ...
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Lombardi, Floria ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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and Other Materials ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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Nanoscale
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Chalmers University of Technology