Uniaxial pressure control of competing orders in a high-temperature superconductor

Author:

Kim H.-H.1ORCID,Souliou S. M.2ORCID,Barber M. E.3ORCID,Lefrançois E.12ORCID,Minola M.1ORCID,Tortora M.1ORCID,Heid R.4ORCID,Nandi N.3,Borzi R. A.5,Garbarino G.2ORCID,Bosak A.2ORCID,Porras J.1,Loew T.1,König M.3,Moll P. J. W.3ORCID,Mackenzie A. P.36,Keimer B.1,Hicks C. W.3ORCID,Le Tacon M.4ORCID

Affiliation:

1. Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany.

2. European Synchrotron Radiation Facility (ESRF), BP 220, F-38043 Grenoble Cedex, France.

3. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany.

4. Institute for Solid State Physics, Karlsruhe Institute of Technology, Hermann-v.-Helmholtz-Platz 176344 Karlsruhe, Germany.

5. Instituto de Física de Líquidos y Sistemas Biológicos (IFLYSIB), UNLP–Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), La Plata, Argentina and Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), c.c. 16, suc. 4, 1900 La Plata, Argentina.

6. Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, UK

Abstract

Cuprates exhibit antiferromagnetic, charge density wave (CDW), and high-temperature superconducting ground states that can be tuned by means of doping and external magnetic fields. However, disorder generated by these tuning methods complicates the interpretation of such experiments. Here, we report a high-resolution inelastic x-ray scattering study of the high-temperature superconductor YBa2Cu3O6.67 under uniaxial stress, and we show that a three-dimensional long-range-ordered CDW state can be induced through pressure along the a axis, in the absence of magnetic fields. A pronounced softening of an optical phonon mode is associated with the CDW transition. The amplitude of the CDW is suppressed below the superconducting transition temperature, indicating competition with superconductivity. The results provide insights into the normal-state properties of cuprates and illustrate the potential of uniaxial-pressure control of competing orders in quantum materials.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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