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Journal Article

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

MPS-Authors
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Loew,  T.
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

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Keimer,  B.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Le Tacon,  M.
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Souliou, S., Gretarsson, H., Garbarino, G., Bosak, A., Porras, J., Loew, T., et al. (2018). Rapid suppression of the charge density wave in YBa2Cu3O6.6 under hydrostatic pressure. Physical Review B, 97(2): 020503(R).


Cite as: https://hdl.handle.net/21.11116/0000-000E-E043-9
Abstract
We report on the effects of hydrostatic pressure (HP) on the charge density wave observed in underdoped cuprates. We studied YBa(2)Cu(3)O(6.)6 (T-c = 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 Q(CDW) rapidly decrease as HP is applied, resulting in the complete suppression of signatures of the CDW below similar to 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.