采用基于投影缀加平面波赝势结合Hubbard修正的局域自旋密度泛函近似的第一性原理计算方法,系统研究了金属?-Ce及其CeO2、Ce2O3的电子结构,并和紫外光电子能谱实验进行对比.结果表明,LSDA+U方法能够对这类强关联电子体系给出正确的描述,在?-Ce首先氧化为Ce2O3并最终转变为CeO2的过程中,最显著的特征是,4f电子发生了局域性向离域性的转变.
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