Field Tuning the G-Factor in InAs Nanowire Double Quantum Dots

TL;DR

This paper investigates how magnetic and electric fields influence the g-factors of spins in InAs nanowire double quantum dots, enabling enhanced control of individual spins through field tuning.

Contribution

It introduces a method to determine the full g-tensor and demonstrates electric and magnetic field tuning for selective spin control in quantum dots.

Findings

Full g-tensor determination from spin resonance data

Electric and magnetic field tuning of g-factors

Selective single spin control achieved

Abstract

We study the effects of magnetic and electric fields on the g-factors of spins confined in a two-electron InAs nanowire double quantum dot. Spin sensitive measurements are performed by monitoring the leakage current in the Pauli blockade regime. Rotations of single spins are driven using electric-dipole spin resonance. The g-factors are extracted from the spin resonance condition as a function of the magnetic field direction, allowing determination of the full g-tensor. Electric and magnetic field tuning can be used to maximize the g-factor difference and in some cases altogether quench the EDSR response, allowing selective single spin control.