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Anomalous electric response of La2-x Sr x CuO4 thin film at Sr doping levels of x≈1/4 and 1/16 is observed when charge moves along the c axis. The capacitance C t of the Pd/La2-x Sr x CuO4/SrTiO3/Pd structure increases sharply, exceeding the capacitance C STO of the Pd/SrTiO3/Pd structure. Oscillatory negative voltage is observed in 4-terminal resistivity measurements of La2-x Sr x CuO4 thin film using Pd electrodes at small current. These phenomena are explained by a model of the spatial ordered state in which CuO2 layers of La2-x Sr x CuO4 is replete with O hole pairs.

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