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A drastic drop of the electrical resistivity was observed on a ferroelectric insulator BaTiO 3 surface, after KrFlaser irradiation in air at atmospheric pressure. The temperature dependence of the resistivity was employed to demonstrate semiconducting behavior. Such behavior was seen when the resistance was measured in nitrogen. When measured in air, the semiconducting layer was oxidized and the insulating behavior restored.
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Igarashi et al. (1989) studied this question.
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