Correction to: Nature Nanotechnology https://doi.org/10.1038/s41565-021-01034-8, published online 20 January 2022.

In the version of article initially published, there was an error in the y-axis label of Fig. 4e. The label, now reading “IDS (μA μm–1),” initially appeared with an ampere, not microampere, following the parenthesis. The change has been made to the HTML and PDF versions of the article.