Performance evaluation of ultra-large-scale first-principles electronic structure calculation code on the K computer. - Yukihiro Hasegawa; Jun-ichi Iwata; Miwako Tsuji; Daisuke Takahashi; Atsushi Oshiyama; Kazuo Minami; Taisuke Boku; Hikaru Inoue; Yoshito Kitazawa; Ikuo Miyoshi; Mitsuo Yokokawa (Int. J. High Perform. Comput. Appl., 2014)