Angle-Resolved Photoemission Spectroscopy of Tetragonal CuO: Evidence for Intralayer Coupling Between Cupratelike Sublattices

S. Moser, L. Moreschini, H.-Y. Yang, D. Innocenti, F. Fuchs, N. H. Hansen, Y. J. Chang, K. S. Kim, A. L. Walter, A. Bostwick, E. Rotenberg, F. Mila, and M. Grioni
Phys. Rev. Lett. 113, 187001 – Published 30 October 2014
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Abstract

We investigate by angle-resolved photoemission the electronic structure of in situ grown tetragonal CuO, a synthetic quasi-two-dimensional edge-sharing cuprate. We show that, in spite of the very different nature of the copper oxide layers, with twice as many Cu in the CuO layers of tetragonal CuO as compared to the CuO2 layers of the high-Tc cuprates, the low-energy electronic excitations are surprisingly similar, with a Zhang-Rice singlet dispersing on weakly coupled cupratelike sublattices. This system should thus be considered as a member of the high-Tc cuprate family, with, however, interesting differences due to the intralayer coupling between the cupratelike sublattices.

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  • Received 11 April 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.187001

© 2014 American Physical Society

Authors & Affiliations

S. Moser1,2, L. Moreschini2, H.-Y. Yang3, D. Innocenti2,4, F. Fuchs5, N. H. Hansen5,6, Y. J. Chang2,7, K. S. Kim2,9,10, A. L. Walter2,8, A. Bostwick2, E. Rotenberg2, F. Mila3, and M. Grioni1

  • 1Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
  • 2Advanced Light Source (ALS), Berkeley, California 94720, USA
  • 3Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
  • 4Dipartimento di Ingegneria Meccanica, Università di Roma Tor Vergata, I-00133 Roma, Italy
  • 5Experimental Physics VI, Julius-Maximilian University of Würzburg, 97074 Würzburg, Germany
  • 6ZAE Bayern, Am Hubland, 97074 Würzburg, Germany
  • 7Department of Physics, University of Seoul, Seoul 130-743, Korea
  • 8Department of Physical Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
  • 9Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
  • 10Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science, Pohang 790-784, Korea

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Issue

Vol. 113, Iss. 18 — 31 October 2014

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