Contribution to a conference proceedings/Contribution to a book

FZJ-2018-05521

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Phase-coherent transport in topological insulator nanocolumns and nanoribbons

Schäpers, T. (Corresponding author)FZJ* ; Weyrich, C.FZJ* ; Rosenbach, D.FZJ* ; Kölzer, J.FZJ* ; Schüffelgen, P.FZJ* ; Mussler, G.FZJ* ; Jalil, A. R.FZJ* ; Lüth, H.FZJ* ; Grützmacher, D.FZJ* ; Schmitt, T.FZJ* ; Schleenvoigt, M.FZJ* ; Jaffrès, H. (Editor) ; Drouhin, H.-J. (Editor) ; Wegrowe, J.-E. (Editor) ; Razeghi, M. (Editor)

2018
SPIE

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Please use a persistent id in citations: doi:10.1117/12.2322720

Abstract: The transport properties of topological insulator nanostructures prepared by selective-area molecular beam epitaxy is investigated. For the nanocolumn structures based on Sb2Te3/Bi2Te3-heterostructures pronounced universal conductance fluctuations are observed in the magnetoconductance, indicating phase-coherent transport. Furthermore, angle-dependent measurements indicate that the phase coherent loops are mainly oriented parallel to the substrate plane. Measurements on nanoribbons based on (Bi0.57Sb0.43)2Te3 revealed a resistance dip due to weak antilocalization as well as universal conductance fluctuations. Here, we also found indications, that the phase-coherent loops are predominantly oriented parallel to the quintuple layers forming the topological insulator.

Keyword(s): Condensed Matter Physics (2nd)

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)

Research Program(s):

1. 522 - Controlling Spin-Based Phenomena (POF3-522) (POF3-522)

Appears in the scientific report 2018

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