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Journal Article

Dynamical decoherence of the light induced interlayer coupling in YBa2Cu3O6+δ

MPS-Authors
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Hunt,  Cassandra R.
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Department of Physics, University of California Berkeley, Berkeley, California, USA;

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Nicoletti,  Daniele
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Kaiser,  Stefan
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Max Planck Institute for Solid State Research, Stuttgart, Germany;

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Loew,  Toshinao
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

Porras,  Juan
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

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Keimer,  Bernhard
Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society;

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Cavalleri,  Andrea
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Department of Physics, Clarendon Laboratory, University of Oxford;

Fulltext (public)

2016-Hunt-PhyRB-94-224303.pdf
(Publisher version), 2MB

Supplementary Material (public)

YBCO_PRB_1607_supplementary_ref_final.pdf
(Supplementary material), 2MB

Citation

Hunt, C. R., Nicoletti, D., Kaiser, S., Pröpper, D., Loew, T., Porras, J., et al. (2016). Dynamical decoherence of the light induced interlayer coupling in YBa2Cu3O6+δ. Physical Review B, 94(22): 224303. doi:10.1103/PhysRevB.94.224303.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-1ADE-B
Abstract
Optical excitation of apical oxygen vibrations in YBa2Cu3O6+δ has been shown to enhance its c-axis superconducting-phase rigidity, as evidenced by a transient blue shift of the equilibrium inter-bilayer Josephson plasma resonance. Surprisingly, a transient c-axis plasma mode could also be induced above Tc by the same apical oxygen excitation, suggesting light activated superfluid tunneling throughout the pseudogap phase of YBa2Cu3O6+δ. However, despite the similarities between the above Tc transient plasma mode and the equilibrium Josephson plasmon, alternative explanations involving high mobility quasiparticle transport should be considered. Here, we report an extensive study of the relaxation of the light-induced plasmon into the equilibrium incoherent phase. These new experiments allow for a critical assessment of the nature of this mode. We determine that the transient plasma relaxes through a collapse of its coherence length rather than its carrier (or superfluid) density. These observations are not easily reconciled with quasiparticle interlayer transport, and rather support transient superfluid tunneling as the origin of the light-induced interlayer coupling in YBa2Cu3O6+δ.