Physical Review Letters, 123-12, 2019 doi:10.1103/PhysRevLett.123.123201
Nishiyama Toshiyuki, Kumagai Yoshiaki, Niozu Akinobu, Fukuzawa Hironobu, Motomura Koji, Bucher Maximilian, Ito Yuta, Takanashi Tsukasa, Asa Kazuki, Sato Yuhiro, You Daehyun, Li Yiwen, Ono Taishi, Kukk Edwin, Miron Catalin, Neagu Liviu, Callegari Carlo, Di Fraia Michele, Rossi Giorgio, Galli Davide E., Pincelli Tommaso, Colombo Alessandro, Kameshima Takashi, Joti Yasumasa, Hatsui Takaki, Owada Shigeki, Katayama Tetsuo, Togashi Tadashi, Tono Kensuke, Yabashi Makina, Matsuda Kazuhiro, Bostedt Christoph, Nagaya Kiyonobu, Ueda Kiyoshi