Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 11: Topological insulators II (joint session HL/TT)
HL 11.6: Talk
Monday, March 12, 2018, 16:30–16:45, A 151
Quantum interference phenomena in selectively grown topological insulator nanoribbons — •Jonas Kölzer1, Daniel Rosenbach1, Tobias Schmitt1, Christian Weyrich1, Peter Schüffelgen1, Michael Schleenvoigt1, Sarah Schmitt1, Abdur Rehman Jalil1, Gregor Mussler1, Vincent Sacksteder2, Detelev Grützmacher1, and Thomas Schäpers1 — 1PGI-9, Forschungzentrum Jülich and JARA-FIT, Germany — 2Royal Holloway University of London, United Kingdom
Quantum topology offers a lot of intriguing physical phenomena and has a huge potential to realize robust quantum computing. Selectively deposited nano devices grown by means of molecular beam epitaxy (MBE) are a first step towards scalable topological insulator (TI) quantum computation.
In order to probe the evidence of topologically protected surface states, magneto conductance measurements are performed. In detail we studied quantum interference effects in the magneto conductance on selectively grown TI nanoribbons at low temperatures. From the conductance modulations we could trace distinct electron paths using FFT analysis in angular dependent measurements. Temperature dependent measurements reveal the quantum nature of the oscillations observed, since they vanish for increasing temperatures.
The next step in characterizing the material system will be to selectively grow Aharonov-Bohm ring structures to characterize quantum oscillations inside the van der Waals layer system.