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Topological Surface...
Topological Surface State in Epitaxial Zigzag Graphene Nanoribbons
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- Nguyen, Thi Thuy Nhung (author)
- Chemnitz University of Technology
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- de Vries, Niels (author)
- Eindhoven University of Technology
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- Karakachian, Hrag (author)
- Max Planck Institute for Solid State Research
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- Gruschwitz, Markus (author)
- Chemnitz University of Technology
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- Aprojanz, Johannes (author)
- Chemnitz University of Technology
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- Zakharov, Alexei A. (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Polley, Craig (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Balasubramanian, Thiagarajan (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory
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- Starke, Ulrich (author)
- Max Planck Institute for Solid State Research
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- Flipse, Cornelis F.J. (author)
- Eindhoven University of Technology
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- Tegenkamp, Christoph (author)
- Chemnitz University of Technology
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(creator_code:org_t)
- 2021-04-05
- 2021
- English 7 s.
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In: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 21:7, s. 2876-2882
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http://dx.doi.org/10...
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Abstract
Subject headings
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- Protected and spin-polarized transport channels are the hallmark of topological insulators, coming along with an intrinsic strong spin-orbit coupling. Here we identified such corresponding chiral states in epitaxially grown zigzag graphene nanoribbons (zz-GNRs), albeit with an extremely weak spin-orbit interaction. While the bulk of the monolayer zz-GNR is fully suspended across a SiC facet, the lower edge merges into the SiC(0001) substrate and reveals a surface state at the Fermi energy, which is extended along the edge and splits in energy toward the bulk. All of the spectroscopic details are precisely described within a tight binding model incorporating a Haldane term and strain effects. The concomitant breaking of time-reversal symmetry without the application of external magnetic fields is supported by ballistic transport revealing a conduction of G = e2/h.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- ballistic transport channel
- STM
- tight binding
- topological surface state
- zigzag graphene nanoribbons
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Nguyen, Thi Thuy ...
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de Vries, Niels
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Karakachian, Hra ...
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Gruschwitz, Mark ...
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Aprojanz, Johann ...
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Zakharov, Alexei ...
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show more...
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Polley, Craig
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Balasubramanian, ...
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Starke, Ulrich
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Flipse, Cornelis ...
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Tegenkamp, Chris ...
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- About the subject
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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 ...
- Articles in the publication
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Nano Letters
- By the university
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Lund University