| Obtaining the energy and momentum dependent many body interactions within a material is the central theme behind most ARPES measurements. However, there has yet to be a clear demonstration that it is possible to extract this information. This is not only due to the inherent difficulties in data analysis, but also in choosing a "best case" material on which to perform the measurements. In our estimation, Sr2RuO4 is the most ideal materials system for this type of work. Recent STM results help to better understand the surface being measured, and a more comprehensive approach to data analysis extracts self-energies that can be corroborated by other measurements. This analysis of Sr2RuO4 gives the most complete picture of a Fermi liquid presently available via ARPES, and helps to highlight the fundamental difficulties with quantitative data analysis that hinder extracting self-energies from more exotic materials. |
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