Hot Spots on the Fermi Surface of Bi2212: Stripes versus Superstructure

H. Ding; J. C. Campuzano; J. Mesot; M. R. Norman

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Hot Spots on the Fermi Surface of Bi2212: Stripes versus Superstructure

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arxiv cond-mat/9811027 v1 pith:YVB24DOM submitted 1998-11-02 cond-mat.supr-con

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

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keywords bi2212stripestheyevidencefermispotssuperstructuresurface

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In a recent paper Saini et al. have reported evidence for a pseudogap around (pi,0) at room temperature in the optimally doped superconductor Bi2212. This result is in contradiction with previous ARPES measurements. Furthermore they observed at certain points on the Fermi surface hot spots of high spectral intensity which they relate to the existence of stripes in the CuO planes. They also claim to have identified a new electronic band along Gamma-M1 whose one dimensional character provides further evidence for stripes. We demonstrate in this Comment that all the measured features can be simply understood by correctly considering the superstructure (umklapp) and shadow bands which occur in Bi2212.

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