Siyushev, P.
Xia, K.
Reuter, R.
Jamali, M.
Zhao, N.
Yang, N.
Duan, C.
Kukharchyk, N.
Wieck, A. D.
Kolesov, R.
Wrachtrup, J.
Article History
Received: 19 January 2014
Accepted: 15 April 2014
First Online: 14 May 2014
Competing interests
: The authors declare no competing financial interests.