Spin-orbit interaction in InSb nanowires

Abstract

We use magnetoconductance measurements in dual-gated InSb nanowire devices together with a theoretical analysis of weak antilocalization to accurately extract spin-orbit strength. In particular, we show that magnetoconductance in our three-dimensional wires is very different compared to wires in two-dimensional electron gases. We obtain a large Rashba spin-orbit strength of $0.5-1\text{eVA˚}$ corresponding to a spin-orbit energy of $0.25-1\text{meV}$. These values underline the potential of InSb nanowires in the study of Majorana fermions in hybrid semiconductor-superconductor devices.

Version as accepted for publication as a Rapid in Phys. Rev. B

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