Physics – Condensed Matter – Superconductivity
Scientific paper
1998-11-02
Phys. Rev. Lett. 82, 2618 (1999)
Physics
Condensed Matter
Superconductivity
1 page, revtex, 1 encapsulated postscript figure (color)
Scientific paper
10.1103/PhysRevLett.82.2618
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.
Campuzano Juan-Carlos
Ding Haibing
Mesot Joel
Norman Michael R.
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