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采用X射线光电子能谱对Bi2Sr2CaCu2-xLixOy体系在真空中获得的清洁表面进行了研究。结果表明:Li的掺入对Bi和Sr的化学键性质几乎没有影响,而Ca,Cu,O的化学键性质有较大的变化,其结合能随着Li含量x的增加向高能方向移动。同时对真空中获得的清洁表面和普通表面样品O1s进行了比较,结果发现真空中获得的清洁样品O1s有一个峰(528.4eV),而普通表面样品O1s有两个峰(528.4eV)和(531eV),这表明O1s的高能峰是由污染产生的。The XPS(X-ray photoelectron spectroscope) measurements of the 80K phase Bi-Sr-Ca-Cu-Li-O ceramics were carried out on surfaces obtained by polishing in ultrahigh vacuum. The results show that the chemical bond natures of Bi and Sr almost did not change, but the binding energies of Ca, Cu and O shifted apparently toward higher energy when Li doped in the Bi-Sr-Ca-Cu-O system. The XPS spectrum of O Is has only singe peak (528.8eV) from clean surfaces polished in vacuum and consists of the OH (531eV) and OL (528.8eV) components from conventionally polished surfaces.







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