Pauli spin-blockade in an InAs nanowire double quantum dot

TL;DR

This paper demonstrates Pauli spin-blockade in an InAs nanowire double quantum dot, showing how small exchange interactions and large singlet-triplet splitting influence electron transport, with tunable properties via gate voltage.

Contribution

It provides experimental confirmation of Pauli spin-blockade in InAs nanowire quantum dots and explores the tunability of singlet-triplet splitting.

Findings

Pauli spin-blockade observed with multiple electrons in the dot

Singlet-triplet splitting can be measured and tuned by gate voltage

Small exchange interactions characteristic of InAs nanowires

Abstract

We measure transport at finite bias through a double quantum dot formed by top-gates in an InAs nanowire. Pauli spin-bockade is confirmed with several electrons in the dot. This is expected due to the small exchange interactions in InAs and the large singlet-triplet splitting, which can be measured and tuned by a gate voltage.