Correction to: Nature Communications 10.1038/s41467-019-10257-2, published online 20 June 2019.
The original version of this Article contained an error in the Acknowledgement. The correct Acknowledgement should have read:
Work by X.D. and G.K. was supported by NSF DMR-1733071. Work by K.H. was supported by NSF DMR 1405303. K.M.S. and J.v.D. acknowledge support from the excellence initiative NIM; A. W. was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-SC0012704.
This has now been corrected in both the PDF and HTML versions of the Article.