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20 September 2018 Phase-coherent transport in topological insulator nanocolumns and nanoribbons
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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.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Thomas Schäpers, Christian Weyrich, Daniel Rosenbach, Jonas Kölzer, Tobias Schmitt, Peter Schüffelgen, Gregor Mussler, Michael Schleenvoigt, Abdur Rehman Jalil, Hans Lüth, and Detlev Grützmacher "Phase-coherent transport in topological insulator nanocolumns and nanoribbons", Proc. SPIE 10732, Spintronics XI, 107320V (20 September 2018);

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