Retrieving the initial-state spin polarization from spin-resolved photoemission: Proposal for a case study on W(110)
Retrieving the initial-state spin polarization from spin-resolved photoemission: Proposal for a case study on W(110)
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从自旋分辨光电发射中检索初始态自旋极化：关于 W(110) 案例研究的提案
DOI：
10.1103/physrevb.98.045124
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发表时间：
2018
影响因子：
3.7
通讯作者：
and Markus Donath
中科院分区：
文献类型：
--
作者：
Juergen Henk;Koji Miyamoto;and Markus Donath
自旋和角分辨光电子能谱通常用来确定占据电子态的自旋织构。如果自旋-轨道耦合很强，光电子的自旋极化和初始态的自旋极化可能会显著偏离。为了部分缓解这个问题，我们提出了一个改进的自旋检索配方。基本思想是将来自(至少)两个不同光电子发射实验的光电子发射强度以一种反映光电子发射装置对称性的方式组合；该过程避免了群论分析或相对论光电子发射计算。本文以W(110)在圆偏振光照射下的光电子发射为例，介绍了这一方法。讨论了该方法的局限性。
Spin- and angle-resolved photoelectron spectroscopy is commonly used to determine the spin texture of the occupied electronic states. If spin-orbit coupling is strong, the spin polarization of the photoelectrons and that of the initial states may deviate significantly. To alleviate part of this problem we propose a recipe for improved spin retrieval. The basic idea is to combine photoemission intensities from (at least) two different photoemission experiments in a way which reflects the symmetry of the photoemission setups; the procedure avoids group-theoretical analyses or relativistic photoemission calculations. In this paper we introduce the approach, motivated by the example of photoemission from W(110) illuminated by circularly polarized light. Limitations of the method are discussed.