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HL: Fachverband Halbleiterphysik
HL 51: Transport Properties (joint session HL/TT)
HL 51.1: Vortrag
Donnerstag, 20. März 2025, 15:00–15:15, H13
Quasi-Ballistic Transport in Phase-Pure GaAs/InAs Core/Shell Nanowires — •Farah Basarić1,2, Vladan Brajović1,2, Gerrit Behner1,2, Kristof Moors1, William Schaarman1, Raghavendra Juluri3, Ana M. Sanchez3, Hans Lüth1,2, Detlev Grützmacher1,2, Alexander Pawlis1,2, and Thomas Schäpers1,2 — 1Peter Grünberg Institut (PGI9), Forschungszentrum Jülich, 52425 Jülich, Germany — 2JARA-Fundamentals of Future Information Technology, Jülich-Aachen Research Alliance, Forschungszentrum Jülich and RWTH Aachen University, Germany — 3Department of Physics, University of Warwick, Coventry CV4 7AL, UK
Core/shell GaAs/InAs nanowires represent tubular conductors due to their insulating core and confined conducting states in the InAs shell. We investigate nanowires with a crystalline phase purity of the InAs shell, where reduced scattering in electronic transport is expected. Low-temperature gate-dependent transport measurements give us insight into different contributions to the oscillatory behavior in the magnetoconductance, as well as the possibility to probe non-local transport phenomena due to large phase coherence length. With temperature-dependent measurements, we resolved the quasi-ballistic transport regime, and estimate the phase coherence length. Both measurements indicate superior transport properties of phase-pure GaAs/InAs nanowires in contrast to previous reports on non-phase pure nanowires. Our findings are an important optimization step for further development of nanowire-based hybrid devices.