Phys. Rev. B 72, 174517 (2005) [5 pages]Polarization effects in photoemission disentangle the origin of the shadow bands in Bi-based superconductorsReceived 27 May 2005; published 22 November 2005 Angle-resolved photoemission spectroscopy has been used to investigate the origin of the shadow bands present at the Fermi surface of bismuth-based superconductors. Momentum distribution curves along the ΓY high-symmetry direction and Fermi surface maps measured on Bi2Sr2CaCu2O8+δ (Bi2212) single crystals with two different doping levels have revealed that the shadow bands and the main bands have different initial state symmetry. This result implies that the orthorhombicity exhibited by these materials cannot be responsible for their emergence at the Fermi surface. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.72.174517
DOI:
10.1103/PhysRevB.72.174517
PACS:
74.72.Hs, 71.18.+y, 79.60.−i
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