Kvasov, Alexander
McGilly, Leo J.
Wang, Jin
Shi, Zhiyong
Sandu, Cosmin S.
Sluka, Tomas
Tagantsev, Alexander K.
Setter, Nava
Article History
Received: 10 December 2015
Accepted: 3 June 2016
First Online: 11 July 2016
Competing interests
: The authors declare no competing financial interests.