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Origin of the shadow Fermi surface in Bi-based cuprates

A. Koitzsch·S. V. Borisenko·A. A. Kordyuk·T. K. Kim·M. Knupfer·J. Fink·M. S. Golden·W. Koops·H. Berger·B. Keimer·C. T. Lin·S. Ono·Y. Ando·R. Follath
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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 peakwidth 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 antiferromagnetic interactions but have a structural origin.

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A. Koitzsch, S. V. Borisenko, A. A. Kordyuk, T. K. Kim, M. Knupfer, J. Fink, M. S. Golden, W. Koops, H. Berger, B. Keimer, C. T. Lin, S. Ono, Y. Ando, R. Follath. 2004-09-15. Origin of the shadow Fermi surface in Bi-based cuprates. https://doi.org/10.1103/physrevb.69.220505

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