Journal Article

FZJ-2020-02877

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Quantum Transport in Topological Surface States of Selectively Grown Bi2Te3 Nanoribbons

Rosenbach, D. (Corresponding author)FZJ* ; Oellers, N.RWTH* ; Jalil, A. R.FZJ* ; Mikulics, M.FZJ* ; Kölzer, J.FZJ* ; Zimmermann, E.FZJ* ; Mussler, G.FZJ* ; Bunte, S.FZJ* ; Grützmacher, D.FZJ* ; Lüth, H.FZJ* ; Schäpers, T.FZJ*

2020
Wiley-VCH Verlag GmbH & Co. KG Weinheim

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/25621  doi:10.1002/aelm.202000205

Abstract: Quasi-1D nanowires of topological insulators are candidate structures in superconductor hybrid architectures for Majorana fermion based quantum computation schemes. Here, selectively grown Bi2Te3 topological insulator nanoribbons at cryogenic temperatures are investigated. The nanoribbons are defined in deep-etched Si3N4/SiO2 nano-trenches on a silicon (111) substrate followed by a selective area growth process via molecular beam epitaxy. The selective area growth is benefcial to the device quality, as no subsequent fabrication needs to be performed to shape the nanoribbons. In the diffusive transport regime of these unintentionally n-doped Bi2Te3 topological insulator nanoribbons, electron trajectories are identifed by analyzing angle dependent universal conductance fluctuation spectra. When the sample is tilted from a perpendicular to a parallel magnetic feld orientation, these high frequent conductance modulations merge with low frequent Aharonov–Bohm type oscillations originating from the topologically protected surface states along the nanoribbon perimeter. For 500 nm wide Hall bars low frequent Shubnikov–de Haas oscillations are identified in a perpendicular magnetic feld orientation. These reveal a topological, high-mobility, 2D transport channel, partially decoupled from the bulk of the material.

Keyword(s): Information and Communication (1st) ; Condensed Matter Physics (2nd)

---

Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)
2. Helmholtz - Nanofacility (HNF)
3. Materialwissenschaft u. Werkstofftechnik (ER-C-2)

Research Program(s):

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

Appears in the scientific report 2020

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---