铁磁铁薄膜俄歇谱中意外大的电子相关：轨道选择库仑和交换贡献
Unexpectedly large electron correlation measured in Auger spectra of ferromagnetic iron thin films: orbital-selected Coulomb and exchange contributions
摘要：
对沉积在Ag（001）上的2 ML磁性Fe膜，测量了一组高达10 eV的电子相关能。利用角分辨俄歇光电子符合谱中的自旋选择性和Cini-Sawatzky理论，解析了自旋极化体系的核-价-价俄歇谱：确定了在衰变中涉及的四个子带（多数自旋和少数自旋以及2g）中产生的两个空穴的每一个单独组合的相关能。两个发射电子的平行和反平行自旋的最终状态之间的能量差归因于最终离子态的自旋翻转能量，从而解开库仑和交换相互作用的贡献。
英文摘要：
A set of electron-correlation energies as large as 10 eV have been measured for a magnetic 2ML Fefilm deposited on Ag(001). By exploiting the spin selectivity in angle-resolved Auger-photoelectroncoincidence spectroscopy and the Cini-Sawatzky theory, the core-valence-valence Auger spectrumof a spin-polarized system have been resolved: correlation energies have been determined for eachindividual combination of the two holes created in the four sub-bands involved in the decay: majorityand minority spin, as well asegandt2g. The energy difference between final states with paralleland antiparallel spin of the two emitted electrons is ascribed to the spin-flip energy for the final ionstate, thus disentangling the contributions of Coulomb and exchange interactions.
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