Correction to: Nature Physics https://doi.org/10.1038/s41567-018-0294-6 published online 8 October 2018.

In the version of this Article originally published, equation (5) incorrectly said \(j_{\mathrm{c}}^{{\mathrm{GL}}}\left( B \right) = \frac{{8e}}{{3\sqrt 3 \uppi h\rho _{\mathrm{s}}(B)\xi _{{\mathrm{GL}}}(B)}}\); it should have said \(j_{\mathrm{c}}^{{\mathrm{GL}}}\left( B \right) = \frac{{4e\rho _{\mathrm{s}}(B)}}{{3\sqrt 3 \hbar \xi _{{\mathrm{GL}}}(B)}}\). This has been corrected in all versions of the Article.