Electronic Structure and the Superconducting Gap of Bi2Sr2CaCu2O8+δ
During the last several years, extensive photoemission studies have been performed on the cuprate superconductors1. These studies revealed, among other things, details near the Fermi level which are sensitive to the shape of the Fermi surface, the highly correlated nature of these oxides, as well as the superconducting gap states. These are arguably the most fundamental questions raised by the novel oxide superconductors. Most of the angle-resolved photoemission efforts were concentrated on Bi2Sr2CaCu2O8+δ (referred as Bi2212 in the rest of the paper) because of its superior material properties (stability in vacuum and ability to cleave)2–4. In this short paper, we give a brief summary of the experimental work on Bi2212 involving the Stanford group in collaboration with groups from Los Alamos, Ames and IBM. We intend to make this paper a “road map” so that the readers can get a general picture of our results, and can find more detailed information about specific issues in the references listed.
KeywordsAnisotropy Coherence Hull
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