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Direct observation of charge order in underdoped and optimally doped Bi2(Sr,La)2CuO6+δ by resonant inelastic x-ray scattering

Y. Y. Peng, M. Salluzzo, X. Sun, A. Ponti, D. Betto, A. M. Ferretti, F. Fumagalli, K. Kummer, M. Le Tacon, X. J. Zhou, N. B. Brookes, L. Braicovich, and G. Ghiringhelli
Phys. Rev. B 94, 184511 – Published 28 November 2016

Abstract

Charge order in underdoped and optimally doped high-Tc superconductors Bi2Sr2xLaxCuO6+δ (Bi2201) is investigated by Cu L3 edge resonant inelastic x-ray scattering. We have directly observed charge density modulation in the optimally doped Bi2201 at momentum transfer Q0.23 reciprocal lattice units, with smaller intensity and correlation length with respect to the underdoped sample. This demonstrates the short-range charge order in Bi2201 persists up to optimal doping, as in other hole-doped cuprates. We explored the nodal (diagonal) direction and found no charge order peak, confirming that charge density modulates only along the Cu-O bond directions. We measured the out-of-plane dependence of charge order, finding a flat response and no maxima at half integer L values. This suggests there is no out-of-plane phase correlation in single layer Bi2201, at variance from YBa2Cu3O6+x and La2x(Ba,Sr)xCuO4. Combining our results with data from the literature we assess that charge order in Bi2201 exists in a large doping range across the phase diagram, i.e., 0.07p0.16, demonstrating thereby that it is intimately entangled with the antiferromagnetic background, the pseudogap, and superconductivity.

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  • Received 5 October 2016
  • Revised 7 November 2016

DOI:https://doi.org/10.1103/PhysRevB.94.184511

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Y. Y. Peng1,*, M. Salluzzo2, X. Sun3, A. Ponti4, D. Betto5, A. M. Ferretti4, F. Fumagalli6, K. Kummer5, M. Le Tacon7,8, X. J. Zhou3, N. B. Brookes5, L. Braicovich1, and G. Ghiringhelli1,9,†

  • 1Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
  • 2CNR-SPIN, Complesso Monte Sant'angelo, Via Cinthia, I-80126 Napoli, Italy
  • 3Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, 100190 Beijing, China
  • 4Istituto di Scienze e Tecnologie Molecolari, Via Camillo Golgi 19, I-20133 Milano, Italy
  • 5ESRF, The European Synchrotron, CS 40220, F-38043 Grenoble Cedex, France
  • 6Italian Institute of Technology-Center for Nanoscience and Technology, Via Pascoli 70/3, 20133 Milano, Italy
  • 7Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany
  • 8Karlsruher Institut für Technologie Institut für Festkörperphysik Hermann-v.-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
  • 9CNR-SPIN and CNISM, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy

  • *yingying.peng@polimi.it
  • giacomo.ghiringhelli@polimi.it

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Issue

Vol. 94, Iss. 18 — 1 November 2016

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