Theory of (e, 2e) reaction near solid surfaces: Application to Si

The use of the (e, 2e) technique in surface state spectroscopy is discussed. A general formulation based on Green function formalism is developed, that allows to take into account the electron-solid interaction. The case of the Si(111) surface is considered in detail. It is shown that the (e, 2e) cross section strongly depends on surface conditions; hence this technique could be an efficient tool for testing reconstruction models.