Journal Article

FZJ-2026-03926

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nonreciprocity in Magnon Mediated Charge-Spin-Orbital Current Interconversion

Ledesma-Martin, J. O. ; Galindez-Ruales, E. ; Krishnia, S. ; Fuhrmann, F. ; Tran, M. D. ; Gupta, R. ; Gasser, M. ; Go, D.FZJ* ; Kamra, A. ; Jakob, G. ; Mokrousov, Y.FZJ* ; Kläui, M. (Corresponding author)

2025
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.nanolett.4c06056  doi:10.34734/FZJ-2026-03926

Abstract: In magnetic systems, angular momentum is carried by spin and orbital degrees of freedom. Nonlocal devices, comprising heavy-metal nanowires on magnetic insulators like yttrium iron garnet (YIG), enable angular momentum transport via magnons. These magnons are polarized by spin accumulation at the interface through the spin Hall effect (SHE) and detected via the inverse SHE (iSHE). The processes are generally reciprocal, as demonstrated by comparable efficiencies when reversing injector and detector roles. However, introducing Ru, which enables the orbital Hall effect (OHE), disrupts this reciprocity. In our system, magnons polarized through combined SHE and OHE and detected via iSHE are 35% more efficient than the reverse process. We attribute this nonreciprocity to nonzero spin vorticity, resulting from varying electron drift velocities across the Pt/Ru interface. This study highlights the potential of orbital transport mechanisms in influencing angular momentum transport and efficiency in nonlocal spintronic devices.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)
2. 3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538) (856538)
3. s-NEBULA - Novel Spin-Based Building Blocks for Advanced TeraHertz Applications (863155) (863155)
4. DFG project G:(GEPRIS)290319996 - Spin+Bahn-Wechselwirkung: Orbitronik und Spin-Bahn Effekte (A01) (290319996) (290319996)
5. DFG project G:(GEPRIS)437337265 - Spin+AFM-Dynamik: Antiferromagnetismus durch Drehimpulsströme und Gitterdynamik (A11) (437337265) (437337265)
6. DFG project G:(GEPRIS)532928663 - Spin+Sensing: Nanoskalige Spin-Phänomene untersucht mit NV-Magnetometrie (A12*) (532928663) (532928663)
7. DFG project G:(GEPRIS)290396061 - Spin+Strom: Drehimpulstransport durch Magnonen, Spins und Orbits (B02) (290396061) (290396061)
8. DFG project G:(GEPRIS)358671374 - Magnetische Austauschkopplung und elektrisches Schalten in multiferroischen BiFeO3/Doppelperowskit Heterostrukturen (358671374) (358671374)

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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