Journal article (2009) - TM McQueen (author), Q. Huang (author), J Checkelsky (author), N.P. Ong (author), RJ Cava (author), V Ksenofontov (author), C Felser (author), Q. Xu (author), H.W. Zandbergen (author), YS Hor (author), J Allred (author), AJ Williams (author), D Qu (author)