Lv, B. Q.
Feng, Z.-L.
Xu, Q.-N.
Gao, X.
Ma, J.-Z.
Kong, L.-Y.
Richard, P.
Huang, Y.-B.
Strocov, V. N.
Fang, C.
Weng, H.-M.
Shi, Y.-G.
Qian, T.
Ding, H.
Article History
Received: 22 November 2016
Accepted: 19 April 2017
First Online: 19 June 2017
Competing interests
: The authors declare no competing financial interests.