Origin of the shadow Fermi surface in Bi-based cuprates
/ Authors
A. Koitzsch, S. Borisenko, A. Kordyuk, Timur K. Kim, M. Knupfer, J. Fink, M. Golden, W. Koops, H. Berger, B. Keimer
and 4 more authors
/ Abstract
We used angle-resolved photoemission spectroscopy to study the shadow Fermi surface in one layer Bi2Sr1.6La0.4CuO6 + delta and two layer (Bi,Pb)2Sr2CaCu2O8 + delta. We find the shadow band to have the same peak width and dispersion as the main band. In addition, the shadow band/main band intensity ratio is found to be binding-energy independent. Consequently, it is concluded that the shadow bands in Bi-based HTSC do not originate from atiferromagnetic interactions, but have a structural origin. ©2004 The American Physical Society
Journal: Physical Review B