Spinorbitronics in the nanoworld:a first-principles view on magnetic skyrmions

Datum

22.05.2024

Zeit

13:30 - 14:30

Sprecher

Prof. Dr. Samir Lounis

Zugehörigkeit

FZ Jülich

Sprache

en

Hauptthema

Materialien

Host

Grit Rötzer

Beschreibung

Spin-orbitronics is an emergent and fast-growing subject, encompassing both fundamental new physics as well as prospective technological developments hinging on the discovery of novel concepts for magnetic bits, their stability, manipulation and efficient detection. In this context, magnetic skyrmions, which are spin-swirling textures of topological nature, emerged as particles with highly potential to store, transport and read information. This is however hindered by various challenges, which affect their detection, nucleation, motion and velocity. In this talk, I will present an overview on how first-principles simulations enable to make progress in this field. I will discuss ab-initio inspired protocols for efficiently detecting non-collinear spin-textures and their chiral nature with all-electrical [1,2] or optical means owing to the presence of topological orbital moments [3]. I will address progress in finding combination of materials that can host intrinsic (non-synthetic) topological AFM solitons, which can have intriguing properties. In contrast to ferromagnetic skyrmions, they are expected to be immune to the skyrmion Hall effect, might offer terahertz dynamics while being insensitive to magnetic fields and dipolar interactions. They emerge as single and strikingly interpenetrating chains with non-trivial dynamics in a row-wise AFM Cr film deposited on PdFe bilayer/Ir(111) [4]. These findings open exciting avenues for engineering and detecting chiral entities for spintronics applications. [1] I. L. Fernandes, S. Blügel, S. Lounis, Nat. Commun. 13, 1576 (2022) [2] D. M. Crum, M. Bouhassoune, J. Bouaziz, B. Schweflinghaus, S. Blügel, S. Lounis, Nat. Commun. 6, 8541 (2015); [3] M. dos Santos Dias, J. Bouaziz, M. Bouhassoune, S. Blügel, S. Lounis, Nat. Commun. 7, 13613 (2016); [4] A. Aldarawsheh, I. L. Fernandes, S. Brinker, M. Sallermann, M. Abusaa, S. Blügel, S. Lounis, Nat. Comm. 13, 7369 (2022)

Links

• Seminars at the IFW

Letztmalig verändert: 22.05.2024, 07:39:52