Effects of the doping and the number of planes on the shadow bands of Bi-based cuprates
LURE - Centre Universitaire Paris-Sud, Bât.
209D, 91898 Orsay Cedex, France
2 Synchrotron SOLEIL- L'Orme des Merisiers, 91192 Gif-sur-Yvette Cedex, France
3 Instituto de Ciencia de Materiales - CSIC, 28049 Madrid, Spain
4 Brookhaven National Laboratory - Physics Department, Building 510B, Upton, New York 11975-5000, USA
5 Laboratoire des Physiques des Solides - Centre Universitaire Paris-Sud, Bât. 510, 91405 Orsay Cedex, France
Corresponding author: a email@example.com
Revised: 29 April 2005
Published online: 18 August 2005
Angle resolved photoemission spectroscopy (ARPES) has been used to investigate the shadow bands present at the Fermi surface of bismuth based superconductors. Bi2Sr2CaCu2O (Bi2212) single crystals with different doping levels and Bi2Sr2CuO (Bi2201) thin films have been studied by means of momentum distribution curves along the ΓY high symmetry direction in two different Brillouin zones and for an extensive photon energy range. The results show an enhancement of the shadow band intensity in the second Brillouin zone for photon energies around eV. Furthermore, the ratio Shadow Bands/Main Band is shown to be constant as a function of both the doping level and the number of CuO2 planes. An interpretation of this observation on the basis of the current theoretical models will be provided.
PACS: 74.72.-h – Cuprate superconductors (high-Tc and insulating parent compounds) / 71.18.+y – Fermi surface: calculations and measurements; effective mass, g factor
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005