Scientific Reports 7:4058; doi:10.1038/s41598-017-04427-9; Article published online 22 June 2017
In the original version of this Article, Y. O. Kvashnin was incorrectly affiliated with ‘Faculdade de Fisica, Universidade Federal do Para, Belem, PA, Brazil’. The correct affiliation is listed below.
Department of Physics and Astronomy, Division of Materials Theory, Uppsala University, Box 516, SE-75120, Uppsala, Sweden.
This error has now been corrected in the PDF and HTML versions of the Article.