Abstract Energy and momentum distributions of correlated electron pairs excited by very low energy (9–30 eV) spin-polarized electrons from a thin Co film on a single crystal of W(110) were detected and analysed. Polarization of the incident electrons was perpendicular to the scattering plane. Spin effects are presented in form of asymmetry A = (I+ − I−)/(I+ + I−), where I+ and I− are two-electron spectra recorded with incident electrons polarization parallel or anti-parallel to the magnetization of the sample, respectively. Performing measurements at two opposite magnetizations of the sample and assuming negligible interference between spin orbit coupling and exchange effect in scattering, two component of asymmetry can be extracted, namely a spin-orbit asymmetry ASO and an exchange asymmetry Aex. The spin-orbit component of the scattering asymmetry was analysed as a function of the primary energy. Contrary to normal expectations the value of spin-orbit asymmetry decreases with increase of the primary energy in the energy range from 9 to 30 eV.

中文翻译：

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通过（e，2e）光谱从Co膜散射极低能自旋极化电子的自旋轨道耦合

摘要 检测和分析了由来自 W(110) 单晶上的 Co 薄膜的极低能量 (9-30 eV) 自旋极化电子激发的相关电子对的能量和动量分布。入射电子的极化垂直于散射平面。自旋效应以不对称的形式呈现 A = (I+ − I−)/(I+ + I−)，其中 I+ 和 I− 是记录的双电子光谱​​，入射电子极化平行或反平行于样品的磁化， 分别。在样品的两个相反磁化强度下进行测量，并假设自旋轨道耦合和散射交换效应之间的干扰可以忽略不计，可以提取不对称的两个分量，即自旋轨道不对称 ASO 和交换不对称 Aex。散射不对称性的自旋轨道分量被分析为一次能量的函数。与正常预期相反，自旋轨道不对称的值随着初级能量在 9 到 30 eV 的能量范围内增加而降低。