Extraction of the Electron Self-Energy from Angle Resolved Photoemission Data: Application to Bi2212

H. Ding; H. Fretwell; J. C. Campuzano; M. Randeria; M. R. Norman

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Extraction of the Electron Self-Energy from Angle Resolved Photoemission Data: Application to Bi2212

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arxiv cond-mat/9806262 v2 pith:EP3PTR2I submitted 1998-06-22 cond-mat.supr-con

M. R. Norman , H. Ding , H. Fretwell , M. Randeria , J. C. Campuzano This is my paper

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keywords dataself-energyanglebi2212directlyelectronphotoemissionresolved

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abstract

The self-energy $\Sigma({\bf k},\omega)$, 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 $Bi_2Sr_2CaCu_2O_{8+x}$ (Bi2212) in the normal, superconducting, and pseudogap phases.

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