arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.4493physics.atom-ph
收藏

自旋极化铬原子的电子弹性散射

Electron elastic scattering off a spin-polarized Cr atom

V. K. Dolmatov, M. Ya. Amusia, L. V. Chernysheva

摘要:

自旋极化Cr(...本文采用单电子“自旋极化”Hartree-Fock和多电子“自旋极化”交换无规相位近似,在电子能量达到$15$ eV的范围内,对$3d^{5}4s^{1}$,$^{7}S$)原子进行了理论研究.结果发现,相反的自旋极化入射电子的散射相移和相应的散射反应的截面显着不同,在一般情况下,即使没有考虑自旋轨道相互作用。这被证明是与存在两个半填充的$3d^{5}$和$4s^{1}$ subshells在铬的配置,诱导相当不同的交换相反的自旋极化的入射电子与原子靶的相互作用。揭示了电子关联在$e^{-}+\rm Cr$弹性散射过程中的重要性。此外,相关性示出,以诱导强烈的差异,相反的自旋极化的电子的散射关闭铬。对后者提供了物理上透明的解释。

英文摘要:

Electron elastic scattering off a spin-polarized Cr(...$3d^{5}4s^{1}$, $^{7}S$) atom is theoretically studied in the region of electron energies up to $15$ eV using both a one-electron "spin-polarized" Hartree-Fock and multielectron "spin-polarized" random phase approximation with exchange. It is found that scattering phase shifts of oppositely spin-polarized incoming electrons and corresponding cross sections of the scattering reactions significantly differ from each other, in general, even without accounting for spin-orbit interaction. This is shown to be associated with the presence of two semifilled $3d^{5}$ and $4s^{1}$ subshells in the Cr's configuration which induce considerably different exchange in the interaction of oppositely spin-polarized incoming electrons with the atom-target. The importance of electron correlation in $e^{-}+\rm Cr$ elastic scattering process is revealed. Moreover, correlation is shown to induce strong differences between scattering of oppositely spin-polarized electrons off Cr. A physically transparent interpretation for the latter is provided.

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。

↑