Shunsuke Kitou, Kentaro Ueda, Yuiga Nakamura, Kunihisa Sugimoto, Yusuke Nomura, Ryotaro Arita, Yoshinori Tokura, Taka-hisa Arima. "Visualization of spin–orbit-entangled 4f electrons in crystalline materials." Proceedings of the National Academy of Sciences, 2025. doi:10.1073/pnas.2500251122