Electrically driven single electron spin resonance in a slanting Zeeman field

TL;DR

This paper demonstrates electrically-driven single electron spin resonance in a double quantum dot system using a micro-magnet, enabling scalable and addressable spin control without high-frequency magnetic fields.

Contribution

It introduces a method for electrically manipulating electron spins in quantum dots via engineered non-uniform magnetic fields, advancing scalable spin control techniques.

Findings

Achieved electrically-driven spin rotations on two electrons.

Utilized a micro-magnet to enable spin selectivity and control.

Demonstrated feasibility of scalable electrical spin manipulation.

Abstract

The rapidly rising fields of spintronics and quantum information science have led to a strong interest in developing the ability to coherently manipulate electron spins. Electron spin resonance (ESR) is a powerful technique to manipulate spins that is commonly achieved by applying an oscillating magnetic field. However, the technique has proven very challenging when addressing individual spins. In contrast, by mixing the spin and charge degrees of freedom in a controlled way through engineered non-uniform magnetic fields, electron spin can be manipulated electrically without the need of high-frequency magnetic fields. Here we realize electrically-driven addressable spin rotations on two individual electrons by integrating a micron-size ferromagnet to a double quantum dot device. We find that the electrical control and spin selectivity is enabled by the micro-magnet's stray magnetic field which can be tailored to multi-dots architecture. Our results demonstrate the feasibility of manipulating electron spins electrically in a scalable way.