@article{Terakawa:2026:10.1002/adma.202521534,
author = {Terakawa, S and Liu, B and Schindler, F and Neupert, T and Ji, J and Domaine, G and McFarlane, EC and Geng, D and Yang, J and Choueikani, F and Ohresser, P and Valvidares, M and Gargiani, P and Polley, C and Carbone, G and Leandersson, M and Parkin, SSP and BedoyaPinto, A and Schröter, NBM},
doi = {10.1002/adma.202521534},
journal = {Advanced Materials},
title = {Proximity induced magnetic anisotropy and trefoil fermiology in monolayer FeCl/Bi(111)},
url = {http://dx.doi.org/10.1002/adma.202521534},
year = {2026}
}

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TY  - JOUR
AB  - Interfaces between magnetic and non-magnetic materials play a crucial role in various magnetic heterostructures. The emergence of 2D van der Waals (vdW) magnets has introduced new opportunities for exploring proximity effects in vdW heterostructures. While the influence of magnetic layers on nearby non-magnetic materials has been widely studied, it remains unclear whether non-magnetic substrates can similarly modulate the intrinsic magnetic properties of 2D magnets, particularly their magnetic anisotropy. In this work, by analyzing X-ray magnetic circular dichroism spectra of an epitaxially grown FeCl2 monolayer on a Bi(111) surface, a reorientation of magnetic anisotropy is observed – from its natural out-of-plane to a predominantly in-plane alignment. This effect vanishes in bilayer FeCl2/Bi(111), where the magnetic anisotropy reverts to its intrinsic out-of-plane orientation, consistent with the layered antiferromagnetic order of bulk FeCl2. Angle-resolved photoelectron spectroscopy reveals the presence of metallic interface states derived from the Bi surface states, accompanied by charge transfer and emergence of a moiré potential that gives rise to a distinctive trefoil-shaped Fermi surface. These results demonstrate that non-magnetic substrates can exert strong proximity influence on the magnetic and electronic behavior of 2D vdW magnets, offering new strategies for engineering magnetic anisotropy and electronic structure in spintronic heterostructures.
AU  - Terakawa,S
AU  - Liu,B
AU  - Schindler,F
AU  - Neupert,T
AU  - Ji,J
AU  - Domaine,G
AU  - McFarlane,EC
AU  - Geng,D
AU  - Yang,J
AU  - Choueikani,F
AU  - Ohresser,P
AU  - Valvidares,M
AU  - Gargiani,P
AU  - Polley,C
AU  - Carbone,G
AU  - Leandersson,M
AU  - Parkin,SSP
AU  - BedoyaPinto,A
AU  - Schröter,NBM
DO  - 10.1002/adma.202521534
PY  - 2026///
SN  - 0935-9648
TI  - Proximity induced magnetic anisotropy and trefoil fermiology in monolayer FeCl/Bi(111)
T2  - Advanced Materials
UR  - http://dx.doi.org/10.1002/adma.202521534
UR  - https://doi.org/10.1002/adma.202521534
ER  - 

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