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Phys. Rev. B 70, 214525 (2004) [6 pages]

Evidence for CuO conducting band splitting in the nodal direction of Bi2Sr2CaCu2O8+δ

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A. A. Kordyuk1,2, S. V. Borisenko1, A. N. Yaresko3, S.-L. Drechsler1, H. Rosner4, T. K. Kim1, A. Koitzsch1, K. A. Nenkov1, M. Knupfer1, J. Fink1, R. Follath5, H. Berger6, B. Keimer7, S. Ono8, and Yoichi Ando8
1Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, P.O.Box 270016, 01171 Dresden, Germany
2Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine
3Max-Planck-Institut für Physik Komplexer Systeme Dresden, 01187 Dresden, Germany
4Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany
5BESSY GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
6Institut de Physique de la Matiére Complexe, EPFL, CH-1015 Lausanne, Switzerland
7Max-Planck Institut für Festkörperforschung, D-70569 Stuttgart, Germany
8Central Research Institute of Electric Power Industry, Komae, Tokyo 201-8511, Japan

Received 6 November 2003; revised 11 August 2004; published 29 December 2004

Using angle-resolved photoemission spectroscopy with ultimate momentum resolution we have explicitly resolved the bilayer splitting in the nodal direction of Bi-2212. The splitting is observed in a wide doping range and, within the experimental uncertainty, its size does not depend on doping. The value of splitting derived from the experiment is in good agreement with that from band structure calculations which implies the absence of any electronic confinement to single planes within bilayers of Bi-2212. Other consequences of this finding are also discussed.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.214525
DOI:
10.1103/PhysRevB.70.214525
PACS:
74.25.Jb, 71.15.Mb, 74.72.Hs, 79.60.−i
 
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