(untitled) - Harada, Y; Tokushima, T; Horikawa, Y; Takahashi, O; Niwa, H; Kobayashi, M; Oshima, M; Senba, Y; Ohashi, H; Wikfeldt, K T; Nilsson, A; Pettersson, L G. M; Shin, S (Phys. Rev. Lett., 2013)