Superconducting Diode sensor

TL;DR

This paper proposes a superconducting Josephson junction diode that detects skyrmion magnetic textures, enabling high-resolution magnetometry and information readout of complex magnetic structures.

Contribution

It introduces a novel superconducting diode sensor leveraging skyrmion magnetic fields, offering an alternative to existing magnetometry technologies.

Findings

Asymmetric supercurrent influenced by skyrmionic magnetic textures

Sensor can read out magnetic texture morphology

Potential for high-resolution magnetic imaging

Abstract

We study the superconducting Josephson junction diode operating via the magnetic field of skyrmions. Inspired by the near-field optical microscopy, we propose to partially screen the magnetic field and analyze part-by-part the magnetic texture of the skyrmion. The detected asymmetric supercurrent is influenced by the skyrmionic magnetic field and magnetic texture. This enables the Josephson junction diode to function as a hyperfine sensor and to read out the information about the morphology of the complex magnetic textures. The proposed setup opens a new avenue in magnetometry and represents an alternative to the technologies based on the nitrogen-vacancy centers.