Physics – Condensed Matter – Superconductivity
Scientific paper
2001-02-19
Phys. Rev. B 64, 094513 (2001)
Physics
Condensed Matter
Superconductivity
12 pages (revtex), 9 figures (jpg)
Scientific paper
10.1103/PhysRevB.64.094513
The strong dependence of the momentum distribution of the photoelectrons on experimental conditions raises the question as to whether angle-resolved photoemission spectroscopy (ARPES) is able to provide an accurate reflection of the Fermi surface in Bi-based cuprate superconductors. In this paper we experimentally prove that the main contribution to the intensity variation comes from matrix elements effects and develop an approach to overcome this problem. We introduce a concept of 'self-normalization' which makes the spectra essentially independent of both the matrix elements and particular experimental parameters. On the basis of this concept we suggest a simple and precise method of Fermi surface determination in quasi-2D systems.
Abell Sandra
Berger Heinz
Borisenko S. V.
Duerr Christian
Eckert Dominique
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