论文标题
库里姆中的准粒子多重组的出现
Emergence of quasiparticle multiplets in curium
论文作者
论文摘要
密度功能理论和单位动力学均值理论的组合用于研究元素曲curium（CM-I，CM-II和CM-III）各种同素异素体的电子结构。我们发现，高对称性CM-I和CM-II相中的5 $ f $ valence电子在低对称性单智性CM-III相中变成行程。另外，在CM-III相的5 $ f $电子密度中鉴定出明显的准粒子多重组。我们认为，这是$ 5F^{7} $和$ 5F^{8} $配置之间的多体过渡，引起了这些Quasiparticle多重组。因此，CM-III阶段可能是所谓的RACAH金属的新实现。
A combination of the density functional theory and the single-site dynamical mean-field theory is employed to study the electronic structures of various allotropes of elemental curium (Cm-I, Cm-II, and Cm-III). We find that the 5$f$ valence electrons in the high-symmetry Cm-I and Cm-II phases remain localized, while they turn into itinerancy in the low-symmetry monoclinic Cm-III phase. In addition, conspicuous quasiparticle multiplets are identified in the 5$f$ electronic density of states of the Cm-III phase. We believe that it is the many-body transition between $5f^{7}$ and $5f^{8}$ configurations that gives rise to these quasiparticle multiplets. Therefore, the Cm-III phase is probably a new realization of the so-called Racah metal.
