Relativistic and topological domainwall signatures in spin space

  1. RAMA EIROA, RICARDO
Supervised by:
  1. Konstantin Guslienko Director
  2. Rubén Miguel Ochoa de Zuazola Director
  3. Arkady Zhukov Tutor
  4. Julián María González Estévez Tutor

Defence university: Universidad del País Vasco - Euskal Herriko Unibertsitatea

Fecha de defensa: 11 January 2023

Type: Thesis

Teseo: 791653 DIALNET lock_openADDI editor

Abstract

All-spintronics-based computational schemes have been envisioned to beat the current von Neumannarchitectures in terms of operating speeds, energy efficiency, and miniaturization. Antiferromagneticsolitons are of special interest due to their energetically-based topological protection, low tendency todeformation during propagation, and ultrafast dynamics in the special relativity framework. Contrary toferromagnets, where moving magnetic textures can be experimentally tracked, in antiferromagnets onlythe domain morphology of the medium can be characterized, being possible, however, to theoreticallyexplore the dynamic behavior of antiferromagnetic solitons for future technological implementations. Inthis thesis, we explore relativistic and topologically-mediated domain wall processes in spin space,presenting insights into fundamental questions such as: the transition from Galilean to relativisticdynamics in ferromagnets, the accurate characterization of the motion of magnetic textures in realantiferromagnets, the beating of the magnonic barrier in antiferromagnets through non-relativisticmagnetic solitons propagation regimes, and potential themal gradients-based detection schemes to discernthe displacement and presence of domain walls in antiferromagnets.