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Rapid suppression of the charge density wave in YBa2Cu3O6.6 under hydrostatic pressure

S. M. Souliou, H. Gretarsson, G. Garbarino, A. Bosak, J. Porras, T. Loew, B. Keimer, and M. Le Tacon
Phys. Rev. B 97, 020503(R) – Published 16 January 2018

Abstract

We report on the effects of hydrostatic pressure (HP) on the charge density wave observed in underdoped cuprates. We studied YBa2Cu3O6.6(Tc=61 K) using high-resolution inelastic x-ray scattering (IXS), and reveal an extreme sensitivity of the phonon anomalies related to the charge density wave (CDW) order to HP. The amplitudes of the normal state broadening and superconductivity-induced phonon softening at QCDW rapidly decrease as HP is applied, resulting in the complete suppression of signatures of the CDW below 10 kbar. Additional IXS measurements on YBa2Cu3O6.75 demonstrate that this very rapid effect cannot be explained by pressure-induced modification of the doping level and highlight the different role of external pressure and doping in tuning the phase diagram of the cuprates. Our results provide insights into the mechanisms underlying the CDW formation and its interplay with superconductivity.

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  • Received 27 September 2017
  • Revised 4 December 2017

DOI:https://doi.org/10.1103/PhysRevB.97.020503

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

S. M. Souliou1,2, H. Gretarsson2, G. Garbarino1, A. Bosak1, J. Porras2, T. Loew2, B. Keimer2, and M. Le Tacon3

  • 1European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France
  • 2Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • 3Karlsruhe Institute of Technology, Institut für Festkörperphysik, D-76021 Karlsruhe, Deutschland

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Issue

Vol. 97, Iss. 2 — 1 January 2018

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