arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1006.3988cond-mat.str-elcond-mat.mtrl-sci
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UO $_{2}$的晶场和磁结构

Crystal field and magnetic structure of UO$_{2}$

Fei Zhou, Vidvuds Ozoliņš

摘要:

UO $_{2}$的性质源于丰富的$f$电子物理,包括电子库仑相互作用、自旋轨道和晶场效应以及离子间多极耦合。我们提出了一个全面的理论研究的电子结构的UO $_{2}$使用自洽DFT+ $U$计算和模型哈密顿的组合应用。得到了与实验符合很好的$^{4+}$基态和$Γ_{5} \rightarrow Γ_{3,4,1}$的晶场激发能。我们还研究了竞争的非共线磁结构,并确认3-k为UO $_2$的T=0 K基态磁结构。

英文摘要:

The properties of UO$_{2}$ result from rich $f$-electron physics, including electronic Coulomb interactions, spin-orbit and crystal field effects, as well as inter-ionic multipolar coupling. We present a comprehensive theoretical study of the electronic structure of UO$_{2}$ using a combined application of self-consistent DFT+$U$ calculations and a model Hamiltonian. The $Γ_{5}$ ground state of U$^{4+}$ and the energies of crystal field excitations $Γ_{5} \rightarrow Γ_{3,4,1}$ are reproduced in very good agreement with experiment. We also investigate competing non-collinear magnetic structures and confirm 3-k as the T=0 K ground state magnetic structure of UO$_2$.

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。

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