Non-Zhang-Rice Singlet Character of the First Ionization State of T-CuO

Clemens P. J. Adolphs, Simon Moser, George A. Sawatzky, and Mona Berciu
Phys. Rev. Lett. 116, 087002 – Published 25 February 2016
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Abstract

We argue that tetragonal CuO (T-CuO) has the potential to finally settle long-standing modeling issues for cuprate physics. We compare the one-hole quasiparticle (qp) dispersion of T-CuO to that of cuprates, in the framework of the strongly correlated (Udd) limit of the three-band Emery model. Unlike in CuO2, magnetic frustration in T-CuO breaks the C4 rotational symmetry and leads to strong deviations from the Zhang-Rice singlet picture in parts of the reciprocal space. Our results are consistent with angle-resolved photoemission spectroscopy data but in sharp contradiction to those of a one-band model previously suggested for them. These differences identify T-CuO as an ideal material to test a variety of scenarios proposed for explaining cuprate phenomenology.

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  • Received 2 June 2015

DOI:https://doi.org/10.1103/PhysRevLett.116.087002

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Clemens P. J. Adolphs1, Simon Moser2,3, George A. Sawatzky1,4, and Mona Berciu1,4

  • 1Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada, V6T 1Z1
  • 2Institute of Condensed Matter Physics, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland
  • 3Advanced Light Source, Berkeley, California 94720, USA
  • 4Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada, V6T 1Z4

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Issue

Vol. 116, Iss. 8 — 26 February 2016

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