A new spin-polarized photoemission spectrometer with very high efficiency and energy resolution.
A new spin-polarized photoemission spectrometer with very high efficiency and energy resolution.
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DOI：
10.1063/1.3058757
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发表时间：
2008-12
期刊：
影响因子：
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通讯作者：
T. Okuda;Y. Takeichi;Y. Maeda;A. Harasawa;I. Matsuda;T. Kinoshita;A. Kakizaki
中科院分区：
文献类型：
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作者：
T. Okuda;Y. Takeichi;Y. Maeda;A. Harasawa;I. Matsuda;T. Kinoshita;A. Kakizaki
采用甚低能电子衍射（VLEED）型自旋极化仪，研制了一种新型的自旋和角分辨光电子能谱仪。在MgO（001）晶体上生长的Fe（001）p（1x 1）-O薄膜作为VLEED靶，与传统的Fe（001）靶相比，具有显著的高自旋分辨能力，有效谢尔曼函数为0.40+/-0.02，寿命长，稳定性好。在高分辨力的条件下，比传统的莫特型旋光仪的效率提高了近100倍，品质因数达到1.9 ± 0.2 × 10 ~（-2）。由于这种高效率，这种新的自旋极化光电子能谱仪可以实现高能量分辨率。VLEED自旋极化仪的简化的靶制备和活化方法使其在自旋极化光电子能谱研究中的应用更加方便和可行。
A new spin- and angle-resolved photoemission spectrometer was developed adopting the very-low-energy-electron-diffraction (VLEED)-type spin polarimeter. The Fe(001)p(1x1)-O film grown on MgO(001) crystal for the VLEED target yields significantly high spin-resolving power, the effective Sherman function of 0.40+/-0.02, with long lifetime and stability compared to the conventional Fe(001) target. Under the favor of high resolving power, approximately 100 times higher efficiency than that of conventional Mott-type spin polarimeter, the figure of merit of 1.9+/-0.2x10(-2) was achieved. Owing to this high efficiency, high-energy resolution can be realized with this new spin-polarized photoemission spectrometer. The simplified ways of target preparation and revitalization make the VLEED spin polarimeter much more convenient and feasible for the spin-polarized photoemission spectroscopy.