Topological energy release from collision of relativistic antiferromagnetic solitons

TL;DR

This paper reveals that antiferromagnetic solitons can transport and release energy through relativistic effects and topological collisions, opening new possibilities for nanoscale energy transport in spintronics.

Contribution

It demonstrates the energy transport and release capabilities of antiferromagnetic solitons via relativistic kinematics and topological collisions, a novel insight in spintronics.

Findings

Antiferromagnetic solitons can uptake, transport, and release energy.

Relativistic kinematics enhances soliton energy with velocity.

Topological collisions enable selective energy release.

Abstract

Magnetic solitons offer functionalities as information carriers in multiple spintronic and magnonic applications. However, their potential for nanoscale energy transport has not been revealed. Here we demonstrate that antiferromagnetic solitons, e.g. domain walls, can uptake, transport and release energy. The key for this functionality resides in their relativistic kinematics; their self-energy increases with velocity due to Lorentz contraction of the soliton and their dynamics can be accelerated up to the effective speed of light of the magnetic medium. Furthermore, their classification in robust topological classes allows to selectively release this energy back into the medium by colliding solitons with opposite topology. Our work uncovers important energy-related aspects of the physics of antiferromagnetic solitons and opens up the attractive possibility for spin-based nanoscale and ultra-fast energy transport devices.