Kou Takubo   Huiyuan Man   Satoru Nakatsuji   Kohei Yamamoto   Yujun Zhang   Yasuyuki Hirata   Hiroki Wadati   Akira Yasui   Takashi Mizokawa   Daniel I. Khomskii   
Both the Jahn-Teller distortion of Cu
O
octahedra and magnetic
ordering are absent in hexagonal Ba
CuSb
O
suggesting a Cu 3
spin-orbital liquid state. Here, by means of resonant x-ray scattering and
absorption experiment, we...