Zhang, Xiao-Xiao
Cao, Ting
Lu, Zhengguang
Lin, Yu-Chuan
Zhang, Fan
Wang, Ying
Li, Zhiqiang
Hone, James C.
Robinson, Joshua A.
Smirnov, Dmitry
Louie, Steven G.
Heinz, Tony F.
Article History
Received: 24 January 2017
Accepted: 26 April 2017
First Online: 26 June 2017
Competing interests
: The authors declare no competing financial interests.