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  Two-fluid dynamics in driven YBa2Cu3O6.48

Ribak, A., Buzzi, M., Nicoletti, D., Singla, R., Liu, Y., Nakata, S., et al. (2023). Two-fluid dynamics in driven YBa2Cu3O6.48. Physical Review B, 107(10): 104508. doi:10.1103/PhysRevB.107.104508.

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© the Author(s). Published by the American Physical Society

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https://arxiv.org/abs/2210.08539 (Preprint)
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https://doi.org/10.1103/PhysRevB.107.104508 (Publisher version)
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 Creators:
Ribak, A.1, Author           
Buzzi, M.1, Author           
Nicoletti, D.1, Author           
Singla, R.1, Author           
Liu, Y.2, Author
Nakata, S.2, Author
Keimer, B.2, Author
Cavalleri, A.1, 3, 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              
2Max Planck Institute for Solid State Research, ou_persistent22              
3Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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 Abstract: Coherent optical excitation of certain phonon modes in YBa2Cu3O6+x has been shown to induce superconducting-like interlayer coherence at temperatures higher than Tc. Recent work has associated these phenomena to a parametric excitation and amplification of Josephson plasma polaritons, which are overdamped above Tc but are made coherent by the phonon drive. However, the dissipative response of uncondensed quasiparticles, which do not couple in the same way to the phonon drive, has not been addressed. Here, we investigate both the enhancement of the superfluid density, ωσ2(ω), and the dissipative response of quasiparticles, σ1(ω), by systematically tuning the duration and energy of the mid-infrared pulse while keeping the peak field fixed. We find that the photoinduced superfluid density saturates to the zero-temperature equilibrium value for pulses made longer than the phonon dephasing time, while the dissipative component continues to grow with increasing pulse duration. We show that superfluid and dissipation remain uncoupled as long as the drive is on, and identify an optimal regime of pump pulse durations for which the superconducting response is maximum and dissipation is minimized.

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Language(s): eng - English
 Dates: 2022-10-142023-03-012023-03-132023-03-01
 Publication Status: Issued
 Pages: -
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 Rev. Type: Peer
 Identifiers: arXiv: 2210.08539
DOI: 10.1103/PhysRevB.107.104508
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Grant ID : 319286
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)
Project name : The research leading to these results received funding from the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC Grant Agreement No. 319286 (QMAC). We acknowledge support from the Deutsche Forschungsgemeinschaft (DFG; German Research Foundation) via the excellence cluster “CUI: Advanced Imaging of Matter” (EXC 2056, project ID 390715994) and the priority program SFB925 (Project ID 170620586).
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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: 107 (10) Sequence Number: 104508 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008