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| Hauptseite > Publikationsdatenbank > Aharonov-Bohm and Altshuler-Aronov-Spivak oscillations in quasi-ballistic phase-pure core/shell GaAs/InAs nanowires |
| Hauptseite > Publikationsdatenbank > Aharonov-Bohm and Altshuler-Aronov-Spivak oscillations in quasi-ballistic phase-pure core/shell GaAs/InAs nanowires |
| Conference Presentation (After Call) | FZJ-2026-01367 |
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2025
Abstract: Qubit systems based on high quality hybrid superconducting quantum devices are often realized by using semiconductor nanowires. In core/shell GaAs/InAs nanowires, containing a tubular conductor in the InAs shell wrapped around an insulating GaAs core, the strong confinement near the surface ensures good coupling to a superconductor. We present magnetotransport measurements on zincblende phase-pure GaAs/InAs core/shell nanowires [1], where the reduced disorder compared to polycrystalline nanowires is expected to result in improved transport properties. When an axial magnetic field is applied penetrating the tubular conductor, h/e-periodic Aharonov-Bohm type oscillations are observed in the magnetoconductance [2]. In addition, phase-rigid h/2e-periodic oscillations corresponding to Altshuler-Aronov-Spivak oscillations are observed. By temperature-dependent measurements, we identify a quasi-ballistic transport regime with few scattering centers in the conducting shell, which nevertheless leads to an Altshuler-Aaronov-Spivak correction.[1] M. M. Jansen et. al., ACS Appl. Nano Mater., 11 (2020) 11037[2] O. Gül et. al., Phys. Rev. B, 89 (2014) 5417
Keyword(s): Information and Communication (1st) ; Condensed Matter Physics (2nd)
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