arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1504.07979cond-mat.str-el
收藏

动态平均场论中轻锕系元素的电子结构和芯能级谱

Electronic structure and core-level spectra of light actinide dioxides in the dynamical mean-field theory

Jindrich Kolorenc, Alexander B. Shick, Alexander I. Lichtenstein

摘要:

局域密度近似结合动力学平均场论(LDA+DMFT)被应用到轻锕系元素二氧化物的顺磁相:UO 2,NPO 2,和PuO 2。计算的带隙和价带电子结构与光吸收实验和光电子能谱符合得很好。发现锕系元素5f壳层与氧的2p态的杂化相对较大,它将5f轨道的填充从具有两个、三个和四个电子的标称离子构型增加到近半整数值2.5、3.4和4.4。大杂交留下的印记也在核心水平的光电发射光谱的卫星峰的形式。结果表明,LDA+DMFT计算准确地再现了这些卫星。

英文摘要:

The local-density approximation combined with the dynamical mean-field theory (LDA+DMFT) is applied to the paramagnetic phase of light actinide dioxides: UO2, NpO2, and PuO2. The calculated band gaps and the valence-band electronic structure are in a very good agreement with the optical absorption experiments as well as with the photoemission spectra. The hybridization of the actinide 5f shell with the 2p states of oxygen is found to be relatively large, it increases the filling of the 5f orbitals from the nominal ionic configurations with two, three, and four electrons to nearly half-integer values 2.5, 3.4 and 4.4. The large hybridization leaves an imprint also on the core-level photoemission spectra in the form of satellite peaks. It is demonstrated that these satellites are accurately reproduced by the LDA+DMFT calculations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑