Quantized Conductance and Large g-Factor Anisotropy in InSb Quantum Point Contacts

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Quantized Conductance and Large g-Factor Anisotropy in InSb Quantum Point Contacts

Journal Article (2016)

Author(s)

Fanming Qu (Kavli institute of nanoscience Delft, TU Delft - QRD/Kouwenhoven Lab, TU Delft - QuTech Advanced Research Centre)

Jasper Van Veen (TU Delft - QuTech Advanced Research Centre, TU Delft - QRD/Kouwenhoven Lab, Kavli institute of nanoscience Delft)

Folkert K. De Vries (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - QRD/Kouwenhoven Lab)

Arjan J.A. Beukman (TU Delft - QRD/Kouwenhoven Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)

Michael Wimmer (Kavli institute of nanoscience Delft, TU Delft - (OLD) Chair of Relation to Practice ur, TU Delft - QuTech Advanced Research Centre)

Wei Yi (HRL Laboratories)

Andrey A. Kiselev (HRL Laboratories)

Binh Minh Nguyen (HRL Laboratories)

Leo P. Kouwenhoven (TU Delft - QRD/Kouwenhoven Lab)

undefined More Authors (External organisation)

Quantum point contact Conductance quantization G-factor anisotropy Electron effective mass InSb quantum well

DOI related publication

https://doi.org/10.1021/acs.nanolett.6b03297 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:fe8fca6f-ab05-4a70-8200-a9768090250c

More Info

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Publication Year

2016

Language

English

Issue number

12

Volume number

16

Pages (from-to)

7509-7513

Downloads counter

293

Abstract

Because of a strong spin-orbit interaction and a large Landé g-factor, InSb plays an important role in research on Majorana fermions. To further explore novel properties of Majorana fermions, hybrid devices based on quantum wells are conceived as an alternative approach to nanowires. In this work, we report a pronounced conductance quantization of quantum point contact devices in InSb/InAlSb quantum wells. Using a rotating magnetic field, we observe a large in-plane (|g₁| = 26) and out-of-plane (|g₁| = 52) g-factor anisotropy. Additionally, we investigate crossings of subbands with opposite spins and extract the electron effective mass from magnetic depopulation of one-dimensional subbands.