Phys. Rev. B 63, 220501(R) (2001) [4 pages]Electronlike Fermi surface and remnant (π,0) feature in overdoped La1.78Sr0.22CuO4
We have performed an angle-resolved photoemission study of overdoped La1.78Sr0.22CuO4, and have observed sharp nodal quasiparticle peaks in the second Brillouin zone that are comparable to data from Bi2Sr2CaCu2O8+δ. The data analysis using energy distribution curves, momentum distribution curves, and intensity maps all show evidence of an electronlike Fermi surface, which is well explained by band-structure calculations. Evidence for many-body effects are also found in the substantial spectral weight remaining below the Fermi level around (π,0), where the band is predicted to lie above EF. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.63.220501
DOI:
10.1103/PhysRevB.63.220501
PACS:
74.25.Jb, 71.18.+y, 74.72.Dn, 79.60.Bm
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