Journal Article

FZJ-2026-05306

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Giant orbital Zeeman effects in a magnetic topological van der Waals interphase

Wichmann, T. (First author) ; Sastges, M.FZJ* ; Jin, K.FZJ* ; Martinez-Castro, J.FZJ* ; Saunderson, T. G.FZJ* ; Go, D. ; Boban, H. ; Lounis, S.FZJ* ; Plucinski, L.FZJ* ; Ternes, M.FZJ* ; Mokrousov, Y.FZJ* ; Tautz, F. S.FZJ* ; Lüpke, F. (Corresponding author)FZJ*

2026
Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41467-026-78016-8  doi:10.34734/FZJ-2026-05306

Abstract: Van der Waals (vdW) heterostructures allow the engineering of magnetic and electronic properties via interfacial orbital hybridization and charge transfer. The resulting electric fields can give rise to Rashba spin-orbit coupling and Dzyaloshinskii-Moriya interactions, which may stabilize novel two-dimensional magnetic phases. While such emergent magnetic ‘interphases’ may offer a promising platform for spin-based electronics, direct spectroscopic evidence for them is still lacking. Here, we report electric-field tunable Zeeman effects with Landé g-factors up to ≈ 230 at the interface of graphene and the vdW ferromagnet Fe3GeTe2. They arise from an interplay of local-moment canting and the itinerant orbital moments of Fe3GeTe2, producing a giant asymmetric level splitting. Exploiting the inelastic phonon gap of graphene, scanning tunneling spectroscopy allows us to access the buried interface properties, and quantify Faraday-like screening. Our findings provide new insights and opportunities for electrically controlled interface magnetism, e.g. for spintronics and orbitronics devices.

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Contributing Institute(s):

1. Quantum Nanoscience (PGI-3)
2. Quanten-Theorie der Materialien (PGI-1)
3. Elektronische Eigenschaften (PGI-6)

Research Program(s):

1. 5213 - Quantum Nanoscience (POF4-521) (POF4-521)
2. DFG project G:(GEPRIS)443416235 - 1D topologische Supraleitung und Majorana Zustände in van der Waals Heterostrukturen charakterisiert durch Rastersondenmikroskopie (443416235) (443416235)
3. DFG project G:(GEPRIS)422707584 - SPP 2244 2D Materialien – die Physik von van der Waals [Hetero-]Strukturen (2DMP) (422707584) (422707584)
4. DFG project G:(GEPRIS)444844585 - Statische und dynamische Kopplung von Gitter- und magnetischen Eigenschaften in zweidimensionalen Materialien mit niedriger Symmetrie (B06) (444844585) (444844585)
5. OBELIX - OBesogenic Endocrine disrupting chemicals: LInking prenatal eXposure to the development of obesity later in life (227391) (227391)
6. ML4Q - Machine Learning for Quantum (101120240) (101120240)
7. DFG project G:(GEPRIS)511561801 - Manipulierung von 2D Supraleitung und Majorana Zuständen auf der Nanoskala (511561801) (511561801)
8. Topological transport in real materials from ab initio (jiff40_20190501) (jiff40_20190501)

Appears in the scientific report 2026

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