This paper was published online on 19 October 2016 with an error in the citation of Ref.. Reference  should read as “K. Nakata, P. Simon, and D. Loss, Phys. Rev. B 92, 134425 (2015).” The reference has been corrected as of 7 November 2016. The reference is correct in the printed version of the journal.
American Physical Society
11 Nov 2016
Volume: 94 Issue: 17 Pages: 179907
Physical Review B