Publisher Correction: Selective enhancement of optical nonlinearity in two-dimensional organic-inorganic lead iodide perovskites

Nature Communications 8:742 doi:10.1038/s41467-017-00788-x; Article published online: 29 Sep 2017

In the PDF version of this article, Eq. 5 is missing all elements after the equals sign. The correct version of Eq. 5 is given below. The HTML version of the paper was correct from the time of publication.

$$\begin{array}{c}\hfill \hfill \\ \hfill G_2\left(x\right)=\hfill & \hfill \frac{1}{{\left(2x\right)}^6}\left\{\begin{array}{c}4\left[1-{\left(1-x\right)}^{3∕2}-{\left(1+x\right)}^{3∕2}\right]-\frac{3}{4}{x}^2\left[{\left(1-x\right)}^{-1∕2}+{\left(1+x\right)}^{-1∕2}\right]\hfill \\ +6x\left\{{\left(1-x\right)}^{1∕2}-{\left(1+x\right)}^{1∕2}\right\}+2\left[H\left(1-2x\right){\left(1-2x\right)}^{3∕2}+{\left(1+2x\right)}^{3∕2}\right]\hfill \end{array}\right\}\hfill \\ \hfill \hfill \\ \hfill \hfill & \hfill +\frac{1}{\left(2^{10}{x}^5\right)}\left\{70x^2+3x\left[{\left(1-x\right)}^{-1∕2}-{\left(1+x\right)}^{-1∕2}\right]-\frac{1}{2}{x}^2\left[{\left(1-x\right)}^{-3∕2}+{\left(1+x\right)}^{-3∕2}\right]\right\}\hfill \\ \hfill \hfill \end{array}$$