Abstract: One-dimensional spin chain materials Li_1-xCuVO₄(x≤0.1) were synthesized by solid state reaction. The X-ray diffraction show that Li_1-xCuVO₄(x≤0.1) was crystallized in inverse spinel structure. Raman measurement displayed 15 vibration models. The loss of Li⁺ had no effect on the long-range and short-range structure based on the X-ray diffraction and Raman spectrum. The X-ray photoemission spectra revealed that the valence state of O ion and V ion remained unchanged in the hole-doped materials, corresponding to the -2 and +5, respectively. The peak position of Cu_2p shifted to the high binding energy in the doped materials, indicating the appearance of holes on the Cu²⁺ and therefore an existence of Cu³⁺.

Key words: LiCuVO₄, One-dimensional spin chain material, Hole doping