Correction to: Nature Electronics https://doi.org/10.1038/s41928-018-0148-3, published online 12 October 2018.

In the version of this Article originally published, in the Methods section ‘Analytical calculation and FEM simulation’ owing to a technical error, the first equation was incorrect as:

$$K_{{\mathrm{eff}}} = \frac{{S_{{\mathrm{eff}}} \times T_0}}{{\mathrm{c}}}$$

It has now been replaced with the correct equation:

$${\mathrm{\Delta }}T = \frac{{S_{{\mathrm{eff}}} \times I \times T_{\mathrm{c}} - \frac{1}{2}I^2 \times R_{{\mathrm{eff}}} - Q_{\mathrm{c}}}}{{K_{{\mathrm{eff}}}}}$$

In addition, in the section ‘Conclusions’, the packing density mistakenly read ‘5,000 leg pairs per cm2’ and has now been corrected to read ‘5,500 leg pairs per cm2’.