This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1088/1361-6641/ab8396 in citations.
Please use the identifier: http://dx.doi.org/10.1088/1361-6641/ab839 in citations.
Please use the identifier: http://hdl.handle.net/2128/25138 in citations.
Phase coherent transport and spin-orbit interaction in GaAs/InSb core/shell nanowires
Phase coherent transport and spin-orbit interaction in GaAs/InSb core/shell nanowires
Low-temperature magnetotransport measurements are performed on GaAs/InSb core-shell nanowires. The nanowires were self-catalyzed grown by molecular beam epitaxy. The conductance measurements as a function of back-gate voltage show an ambipolar behavior comprising an insulating range in between the t...
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Personal Name(s): | Zellekens, Patrick |
---|---|
Demarina, Nataliya / Janssen, Johanna / Rieger, Torsten / Lepsa, Mihail Ion / Perla, Pujitha / Panaitov, G. / Lüth, Hans / Grützmacher, Detlev / Schäpers, Thomas (Corresponding author) | |
Contributing Institute: |
Halbleiter-Nanoelektronik; PGI-9 JARA-FIT; JARA-FIT Bioelektronik; IBI-3 JARA Institut Green IT; PGI-10 Theoretische Nanoelektronik; PGI-2 |
Published in: | Semiconductor science and technology, 35 (2020) 8, S. 13 |
Imprint: |
Bristol
IOP Publ.
2020
|
DOI: |
10.1088/1361-6641/ab8396 |
DOI: |
10.1088/1361-6641/ab839 |
Document Type: |
Journal Article |
Research Program: |
Controlling Spin-Based Phenomena |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1088/1361-6641/ab839 in citations.
Please use the identifier: http://hdl.handle.net/2128/25138 in citations.
Low-temperature magnetotransport measurements are performed on GaAs/InSb core-shell nanowires. The nanowires were self-catalyzed grown by molecular beam epitaxy. The conductance measurements as a function of back-gate voltage show an ambipolar behavior comprising an insulating range in between the transition from the p-type to the n-type region. Simulations based on a self-consistent Schrödinger--Poisson solver revealed that the ambipolar characteristics originate from a Fermi level dependent occupation of hole and electron states within the approximately circular quantum well formed in the InSb shell. By applying a perpendicular magnetic field with respect to the nanowire axis, conductance fluctuations were observed, which are used to extract the phase-coherence length. By averaging the magneto-conductance traces at different back-gate voltages, weak antilocalization features are resolved. Regular flux-periodic conductance oscillations are measured when an axial magnetic field is applied. These oscillations are attributed to closed-loop quantized states located in the InSb shell which shift their energetic position periodically with the magnetic flux. Possible reasons for experimentally observed variations in the oscillation patterns are discussed using simulation results. |