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.
Highlights
Solutions for an efficient control of energy in nanoelectronics are based on identifying the prevailing carriers and transfer mechanisms of energy at relevant time and length scales
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
We show that topological magnetic soliton (TMS) can be used as energy carriers, in particular AFM domain walls (DWs) can uptake, transport, and release energy
Summary
Solutions for an efficient control of energy in nanoelectronics are based on identifying the prevailing carriers and transfer mechanisms of energy at relevant time and length scales. Our proposal relies on the unique dynamical properties of DWs (MSs) in antiferromagnetic (AFM) materials [28,29,30,31,32] Since they obey the relativistic kinematics, their width and energy strongly depend on the soliton velocity [Fig. 1(a)], which results in a significant increase of magnetic energy in the system. To DWs in ferromagnets, which are prone to deformation at relatively low velocities [19,33,34,35,36], AFM DWs offer the possibility to transport their self-energy at speeds close to the effective speed of light of the medium c [37] [Fig. 1(a)]. Demonstrate the role of topology and relativistic nature of AFM TMS in these processes
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