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Surprises in the doping dependence of the Fermi surface in Bi(Pb)-2212

A. A. Kordyuk·S. V. Borisenko·M. S. Golden·S. Legner·K. A. Nenkov·M. Knupfer·J. Fink·H. Berger·L. Forro
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Abstract

A detailed and systematic ARPES investigation of the doping-dependence of the normal state Fermi surface (FS) of modulation-free (Pb,Bi)-2212 is presented. The FS does not change in topology away from hole-like at any stage. The data reveal, in addition, a number of surprises. Firstly the FS area does not follow the usual curve describing Tc vs x for the hole doped cuprates, but is down-shifted in doping by ca. 0.05 holes per Cu site, indicating either the break-down of Luttinger's theorem or the consequences of a significant bi-layer splitting of the FS. Secondly, the strong k-dependence of the FS width is shown to be doping independent. Finally, the relative strength of the shadow FS has a doping dependence mirroring that of Tc.

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A. A. Kordyuk, S. V. Borisenko, M. S. Golden, S. Legner, K. A. Nenkov, M. Knupfer, J. Fink, H. Berger, L. Forro. 2001-04-17. Surprises in the doping dependence of the Fermi surface in Bi(Pb)-2212. https://doi.org/10.1103/physrevb.66.014502

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