Correction to: Nature Materials https://doi.org/10.1038/s41563-020-0760-2, published online 10 August 2020.

In the version of this Article originally published, the first term of equation (2) was missing a minus sign and incorrectly read \(\frac{{\partial \eta _i\left( {{\mathbf{r}},t} \right)}}{{\partial t}}\); it should have read \(- \frac{{\partial \eta _i\left( {{\mathbf{r}},t} \right)}}{{\partial t}}\). This has now been corrected in all versions of the Article.