Addendum to: Nature Electronics https://doi.org/10.1038/s41928-020-00507-3, published online 17 November 2020.

The Nature article featured in this Research Highlight has been retracted (Retraction Note, Nature https://doi.org/10.1038/s41586-022-05294-9 (2022)) on 26 September 2022 following Editorial investigation of key data processing steps that undermined confidence in the magnetic susceptibility data as a whole.