• Rapid Communication

Distribution of electrons and holes in cuprate superconductors as determined from 17O and Cu63 nuclear magnetic resonance

Michael Jurkutat, Damian Rybicki, Oleg P. Sushkov, Grant V. M. Williams, Andreas Erb, and Jürgen Haase
Phys. Rev. B 90, 140504(R) – Published 20 October 2014

Abstract

The local distribution of electrons and holes in the CuO2 plane of the high-temperature superconducting cuprates is determined with nuclear magnetic resonance through the quadrupole splittings of 17O and Cu63. Based on new data for single crystals of electron-doped Pr2xCexCuO4 (x=0, 0.05, 0.10, 0.15) as well as Nd2xCexCuO4 (x=0, 0.13) the changes in hole contents nd of Cu 3dx2y2 and np of O 2pσ orbitals are determined and these account for the stoichiometrically doped charges, similar to hole-doped La2xSrxCuO4. It emerges that while nd+2np=1 in all parent materials as expected, nd and np vary substantially between different groups of materials. Doping holes increases predominantly np, but also nd. To the contrary, doping electrons predominantly decreases nd and only slightly np. However, np for the electron-doped systems is higher than that in hole-doped La1.85Sr0.15CuO4. Cuprates with the highest maximum Tc's appear to have a comparatively low nd and high np. The rather high oxygen hole content of the Pr2CuO4 and Nd2CuO4 with the low nd seems to make them ideal candidates for hole doping to obtain a potentially high Tc.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 21 March 2014
  • Revised 1 October 2014

DOI:https://doi.org/10.1103/PhysRevB.90.140504

©2014 American Physical Society

Authors & Affiliations

Michael Jurkutat1, Damian Rybicki1,2, Oleg P. Sushkov3, Grant V. M. Williams4, Andreas Erb5, and Jürgen Haase1

  • 1Faculty of Physics and Earth Sciences, University of Leipzig, Linnestrasse 5, 04103 Leipzig, Germany
  • 2AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Department of Solid State Physics, al. A. Mickiewicza 30, 30-059 Krakow, Poland
  • 3School of Physics, University of New South Wales, Sydney, Australia
  • 4School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand
  • 5Walther Meissner Institute for Low Temperature Research, Walther-Meissner-Strasse 8, 85748 Garching, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 90, Iss. 14 — 1 October 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×