Uniaxial pressure control of competing orders in a high-temperature superconductor
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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.
Kim , H H , Souliou , S M , Barber , M E , Lefrançois , E , Minola , M , Tortora , M , Heid , R , Nandi , N , Borzi , R A , Garbarino , G , Bosak , A , Porras , J , Loew , T , König , M , Moll , P M , Mackenzie , A P , Keimer , B , Hicks , C W & Le Tacon , M 2018 , ' Uniaxial pressure control of competing orders in a high-temperature superconductor ' , Science , vol. 362 , no. 6418 , pp. 1040-1044 . https://doi.org/10.1126/science.aat4708
© 2018, the Author(s). This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1126/science.aat4708
DescriptionWe acknowledge the support of the Helmholtz association through the program Science and Technology of Nanosystems and of the Max Planck Society. R.A.B. acknowledges partial financial support from Agencia Nacional de Promoción Científica y Tecnológica (PICT 2014 no. 2618) and CONICET (PIP 0446).
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