Journal Article

FZJ-2026-02817

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Observation of orbital pumping

Hayashi, H. ; Go, D.FZJ* ; Haku, S. ; Mokrousov, Y.FZJ* ; Ando, K. (Corresponding author)

2024
Springer Nature Limited London

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Please use a persistent id in citations: doi:10.1038/s41928-024-01193-1

Abstract: Electrons carry both spin and orbital angular momentum. The search for phenomena that generate a flow of spin angular momentum—a spin current—has led to the development of spintronics. In contrast, the orbital counterpart of spin current—an orbital current—has largely been overlooked, and the generation of an orbital current remains challenging. Here we report the observation of orbital-current generation from magnetization dynamics: orbital pumping. We show that orbital pumping in nickel/titanium bilayers injects an orbital current into the titanium layer, which we detect through the inverse orbital Hall effect. Orbital pumping is the orbital counterpart of spin pumping, a versatile and powerful mechanism for spin-current generation. Our findings could, thus, provide a promising approach for generating orbital currents and could help in the development of the orbital analogue of spintronics: orbitronics.

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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. DFG project G:(GEPRIS)437337265 - Spin+AFM-Dynamik: Antiferromagnetismus durch Drehimpulsströme und Gitterdynamik (A11) (437337265) (437337265)
3. DFG project G:(GEPRIS)444844585 - Statische und dynamische Kopplung von Gitter- und magnetischen Eigenschaften in zweidimensionalen Materialien mit niedriger Symmetrie (B06) (444844585) (444844585)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; DEAL Nature ; Essential Science Indicators ; IF >= 30 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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