Many-Body Effects at Surfaces
The lectures I will give here will be based in the first instance on the thesis of one of my Cambridge students, Dr. John C. Inkson , which has been the source of a number of articles in the literature . John’s work in turn leans heavily as far as formalism is concerned on some papers by D.M. Newns , and on Denis Newns’ advice and help during the period when he was at Cambridge. All of his work is concerned with many-electron effects at interfaces; the main intention was to study the metal-semiconductor interface with a view to understanding the so-called surface state phenomenon, but in the end we found ourselves concerned with all kinds of surfaces and with the whole range of electronic excitations which may occur at surfaces, whether metal-vacuum, metal-insulator or metal-semiconductor. I will also draw on work on surface states by various people at Bell and Cambridge: Heine, Pendry, Appelbaum and Hamann.
KeywordsDielectric Constant Fermi Level Semiconductor Surface Penn Model Wannier Function
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