Frustrated random-singlet state with ice-type structural fluctuation in spinel titanates - Noriaki Hanasaki; Takayuki Hattori; Takumi Komoda; Kouei Minamoto; Shuhei Torigoe; Satoshi Yamashita; Yasuhiro Nakazawa; Takehito Nakano; Kouhei Yoshimi; Mitsuharu Yashima; Hidekazu Mukuda; Utami Widyaiswari; et al. (Proceedings of the National Academy of Sciences, 2026)