Publisher Correction: A square-root topological insulator with non-quantized indices realized with photonic Aharonov–Bohm cages

Correction to: Nature Communications 10.1038/s41467-020-14692-4, published online 14 February 2020.

The original version of this article had an error in Fig. 4d. On the upper-left side of the equation “$E=\pm 2t$”, The “$\mp$” sign was mistakenly typed as a “$\pm$” sign. A correct Fig. 4 is supplemented with this correction. This error has been corrected in both the PDF and HTML versions of the article.

Fig. 4