Extraction of the Electron Self-Energy from Angle Resolved Photoemission Data: Application to Bi2212
Abstract
The self-energy ( k,ω), the fundamental function which describes the effects of many-body interactions on an electron in a solid, is usually difficult to obtain directly from experimental data. In this paper, we show that by making certain reasonable assumptions, the self-energy can be directly determined from angle resolved photoemission data. We demonstrate this method on data for the high temperature superconductor Bi2Sr2CaCu2O8+x (Bi2212) in the normal, superconducting, and pseudogap phases.
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