Interplay between Chirality, Spin Textures and Superconductivity at Manufactured Interfaces

Introduction

Memories that operate at cryogenic temperatures are urgently needed to realize advanced quantum and superconducting computing systems that will enable more efficient and scalable computing systems beyond today's reach.

Project Overview

SUPERMINT proposes to combine the latest advances in superconductivity and spintronics to build a novel SUPERTRACK cryogenic memory that is high performance, non-volatile, and requires very low energy for its operation.

Objectives

1. Demonstrate Triplet Supercurrents
   A major objective will be to demonstrate the generation and use of triplet supercurrents, which are dissipation-less and carry spin-angular momentum, to move chiral domain walls in magnetic racetracks.

2. Explore Non-reciprocal Josephson Diode Effect
   A second major objective will be to explore the origin and utilize our recent discovery of a non-reciprocal Josephson diode effect to build a novel device to detect magnetic fields and thereby read magnetic domain walls for SUPERTRACK.

Methodology

These objectives will be met by exploring and designing manufactured interfaces or MINTs that combine superconducting and magnetic ultra-thin layers using an advanced complex of thin film deposition systems that I have constructed over the past 5 years.

Fundamental Breakthroughs

To achieve these objectives, fundamental breakthroughs are needed in the preparation of MINTs with high-quality interfaces.

Exploration of MINTs

A wide-ranging exploration of MINTs formed from:

• Superconducting layers with chiral antiferromagnets
• Homo-chiral layers of chiral compounds, especially from the B20 family of materials
• Geometrical chiral structures

will be undertaken.

Novel Interfaces

In addition, the concept of obstructed atomic insulators that we have recently developed will be used to identify novel interfaces of insulating materials that are metallic. This will allow us to explore the possibility of making these superconducting by pairing electrons via chiral antiferromagnetic fluctuations in adjacent layers.