Journal Article

FZJ-2024-03561

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ultrafast light-induced magnetization in non-magnetic films: from orbital and spin Hall phenomena to the inverse Faraday effect

Hamamera, H. ; Guimaraes, F.FZJ* ; dos Santos Dias, M.FZJ* ; Lounis, S. (Corresponding author)FZJ*

2024
Frontiers Media Lausanne

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Please use a persistent id in citations: doi:10.3389/fphy.2024.1354870  doi:10.34734/FZJ-2024-03561

Abstract: The field of orbitronics has emerged with great potential to impact information technology by enabling environmentally friendly electronic devices. The main electronic degree of freedom at play is the orbital angular momentum, which can give rise to a myriad of phenomena such as the orbital Hall effect (OHE), torques and orbital magnetoelectric effects. Here, we explore via realistic time-dependent electronic structure simulations the magnetic response of a non-magnetic material, an ultrathin Pt film, to ultrafast laser pulses of different polarizatons and helicities. We demonstrate the generation of significant orbital and spin magnetizations and identify the underlying mechanisms consisting of the interplay of the OHE, inverse Faraday effect and spin-orbit interaction. Our discoveries advocate for the prospect of encoding magnetic information using light in materials that are not inherently magnetic.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522) (POF4-522)
2. Dynasore - Dynamical magnetic excitations with spin-orbit interaction in realistic nanostructures (681405) (681405)
3. ATMLAO - ATML Application Optimization and User Service Tools (ATMLAO) (ATMLAO)

Appears in the scientific report 2024

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