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

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.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-1ADE-B Version Permalink: http://hdl.handle.net/21.11116/0000-0001-E5D3-E
Genre: Journal Article

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 Creators:
Hunt, Cassandra R.1, 2, Author              
Nicoletti, Daniele1, Author              
Kaiser, Stefan1, 3, Author              
Pröpper, D.3, Author
Loew, Toshinao4, Author              
Porras, Juan4, Author
Keimer, Bernhard4, Author              
Cavalleri, Andrea1, 5, Author              
Affiliations:
1Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              
2Department of Physics, University of California Berkeley, Berkeley, California, USA, ou_persistent22              
3Max Planck Institute for Solid State Research, Stuttgart, Germany, ou_persistent22              
4Solid State Spectroscopy, Max Planck Institute for Solid State Research, Max Planck Society, ou_persistent22              
5Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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Free keywords: Condensed Matter; Superconductivity; Strongly Correlated Electrons
 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.

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Language(s): eng - English
 Dates: 2016-07-282016-10-272016-12-122016-12-12
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.94.224303
arXiv: 1607.08655
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 94 (22) Sequence Number: 224303 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008