Correction to: npj Quantum Materials; https://doi.org/10.1038/s41535-018-0080-9; published online 15 February 2018

The original version of this Article contained an error in the spelling of the author Adam P. Dioguardi, which was incorrectly given as Aadm P. Dioguardi. This has now been corrected in both the PDF and HTML versions of the Article.