Errea, Ion
Calandra, Matteo
Pickard, Chris J.
Nelson, Joseph R.
Needs, Richard J.
Li, Yinwei
Liu, Hanyu
Zhang, Yunwei
Ma, Yanming
Mauri, Francesco
Article History
Received: 6 December 2015
Accepted: 20 January 2016
First Online: 28 March 2016
Competing interests
: The authors declare no competing financial interests.