TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.4.141
TI  - Non-topological edge-localized Yu-Shiba-Rusinov states in CrBr$_3$/NbSe$_2$ heterostructures
PY  - 2025/04/28
UR  - https://www.scipost.org/SciPostPhys.18.4.141
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 4
SP  - 141
A1  - Cuperus, Jan
AU  - Vanmaekelbergh, Daniël
AU  - Swart, Ingmar
AB  - Topological superconductivity is predicted to emerge in certain magnet-superconductor hybrid systems. Here, we revisit the heterostructure of insulating monolayer CrBr$_{3}$ and NbSe$_{2}$, for which different conclusions on the presence of topological superconductivity have been reported. Using low-temperature scanning tunneling microscopy and (shot noise) spectroscopy, we find that the superconducting gap well inside the CrBr$_{3}$ islands is not affected by magnetism. At the island edges, we observe Yu-Shiba-Rusinov (YSR) states at a variety of in-gap positions, including zero energy. The absence of topological superconductivity is verified by extensive dI/dV measurements at the CrBr$_{3}$ island edges. Our results ask for a more detailed understanding of the interaction between magnetic insulators and superconductors.
ER  -

@Article{10.21468/SciPostPhys.18.4.141,
	title={{Non-topological edge-localized Yu-Shiba-Rusinov states in CrBr$_3$/NbSe$_2$ heterostructures}},
	author={Jan P. Cuperus and Daniel Vanmaekelbergh and Ingmar Swart},
	journal={SciPost Phys.},
	volume={18},
	pages={141},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.4.141},
	url={https://scipost.org/10.21468/SciPostPhys.18.4.141},
}