{"title":"Theory of circular dichroism in angle- and spin-resolved photoemission from the surface state on Bi(111)","authors":"E.E. Krasovskii","doi":"10.1016/j.elspec.2024.147501","DOIUrl":null,"url":null,"abstract":"<div><div>Circular dichroism (CD) of photoemission from a surface state on Bi(111) is considered within an <em>ab initio</em> one-step theory of photoemission. The symmetry of the azimuthal distribution of CD for different spin directions is discussed in terms of the spin structure of the initial states. Both normal and off-normal light incidence are considered. Strong photon energy dependence of photoemission in the ultraviolet range is observed. The principal difference between the initial state spin polarization and the spin photocurrent is emphasized and problems with revealing the orbital angular moment with photoemission are pointed to.</div></div>","PeriodicalId":15726,"journal":{"name":"Journal of Electron Spectroscopy and Related Phenomena","volume":"277 ","pages":"Article 147501"},"PeriodicalIF":1.8000,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electron Spectroscopy and Related Phenomena","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0368204824000847","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"SPECTROSCOPY","Score":null,"Total":0}
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Abstract
Circular dichroism (CD) of photoemission from a surface state on Bi(111) is considered within an ab initio one-step theory of photoemission. The symmetry of the azimuthal distribution of CD for different spin directions is discussed in terms of the spin structure of the initial states. Both normal and off-normal light incidence are considered. Strong photon energy dependence of photoemission in the ultraviolet range is observed. The principal difference between the initial state spin polarization and the spin photocurrent is emphasized and problems with revealing the orbital angular moment with photoemission are pointed to.
根据光致发光的ab initio一步理论，研究了Bi(111)表面态光致发光的圆二色性（CD）。根据初始态的自旋结构，讨论了不同自旋方向 CD 方位角分布的对称性。研究同时考虑了正常光入射和非正常光入射。在紫外线范围内观察到了光发射的强烈光子能量依赖性。强调了初始态自旋极化与自旋光电流之间的主要区别，并指出了用光辐射揭示轨道角矩的问题。
期刊介绍：
The Journal of Electron Spectroscopy and Related Phenomena publishes experimental, theoretical and applied work in the field of electron spectroscopy and electronic structure, involving techniques which use high energy photons (>10 eV) or electrons as probes or detected particles in the investigation.
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