Conductance Quantization at Zero Magnetic Field in InSb Nanowires.
Ballistic electron transport is a key requirement for existence of a topological phase transition in proximitized InSb nanowires. However, measurements of quantized conductance as direct evidence of ballistic transport have so far been obscured due to the increased chance of backscattering in one-dimensional nanowires. We show that by improving the nanowire-metal interface as well as the dielectric environment we can consistently achieve conductance quantization at zero magnetic field. Additionally we study the contribution of orbital effects to the sub-band dispersion for different orientation of the magnetic field, observing a near-degeneracy between the second and third sub-bands.
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Jakob
J
Kammhuber
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Maja C
MC
Cassidy
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Hao
H
Zhang
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Önder
Ö
Gül
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Fei
F
Pei
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Michiel W A
MW
de Moor
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Bas
B
Nijholt
Advanced Materials Laboratory, National Institute for Materials Science , 1-1 Namiki, Tsukuba 305-0044, Japan.
Kenji
K
Watanabe
Advanced Materials Laboratory, National Institute for Materials Science , 1-1 Namiki, Tsukuba 305-0044, Japan.
Takashi
T
Taniguchi
Department of Applied Physics, Eindhoven University of Technology , 5600 MB Eindhoven, The Netherlands.
Diana
D
Car
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.|Department of Applied Physics, Eindhoven University of Technology , 5600 MB Eindhoven, The Netherlands.
Sébastien R
SR
Plissard
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.|Department of Applied Physics, Eindhoven University of Technology , 5600 MB Eindhoven, The Netherlands.
Erik P A M
EP
Bakkers
QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2628 CJ Delft, The Netherlands.
Leo P
LP
Kouwenhoven
InSb; Quantum point contact; conductance quantization; nanowire; orbital effects; subband