Photoemission Theory
نویسنده
چکیده
Photoemission spectroscopy has developed to one of the most powerful tools to study electronic and surface structures.1 This review article discusses basic features of photoemission theory based on many-body scattering theory. More sophisticated theory can be developed on the basis of nonequilibrium Green’s functions2–4 and quantum electrodynamics.5 These approaches are very powerful; however, they requires more theoretical background. Here, we rather extensively use the simple and direct method; the many-body scattering theory6–9 is still widely applicable as demonstrated below. Also, we restrict to nonrelativistic framework. Relativistic photoemission theory is found in other references.10,11
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