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  Pump Frequency Resonances for Light-Induced Incipient Superconductivity in YBa2Cu3O6.5

Liu, B., Först, M., Fechner, M., Nicoletti, D., Porras, J., Loew, T., et al. (2020). Pump Frequency Resonances for Light-Induced Incipient Superconductivity in YBa2Cu3O6.5. Physical Review X, 10(1): 011053. doi:10.1103/PhysRevX.10.011053.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-A4EC-A Version Permalink: http://hdl.handle.net/21.11116/0000-0005-C4CB-9
Genre: Journal Article

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PhysRevX.10.011053.pdf (Publisher version), 3MB
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PhysRevX.10.011053.pdf
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by the Max Planck Society.
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Liu-PRX-SM.pdf (Supplementary material), 4MB
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Liu-PRX-SM.pdf
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Supplemental Material - Details on the experimental setup, data acquisition and evaluation, equilibrium optical properties, uncertainties in the determination of the transient optical properties, fitting models, extended data sets, pump electric field dependence, transient response below Tc, pump induced heating, and the ab-initio calculations of the structural dynamics.
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https://arxiv.org/abs/1905.08356 (Preprint)
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https://dx.doi.org/10.1103/PhysRevX.10.011053 (Publisher version)
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 Creators:
Liu, B.1, Author              
Först, M.1, Author              
Fechner, M.1, Author              
Nicoletti, D.1, Author              
Porras, J.2, Author
Loew, T.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, University of Oxford, Clarendon Laboratory, ou_persistent22              

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 Abstract: Optical excitation in the cuprates has been shown to induce transient superconducting correlations above the thermodynamic transition temperature TC, as evidenced by the terahertz-frequency optical properties in the nonequilibrium state. In YBa2Cu3O6+x, this phenomenon has so far been associated with the nonlinear excitation of certain lattice modes and the creation of new crystal structures. In other compounds, like La2−xBaxCuO4, similar effects were reported also for excitation at near-infrared frequencies, and were interpreted as a signature of the melting of competing orders. However, to date, it has not been possible to systematically tune the pump frequency widely in any one compound, to comprehensively compare the frequency-dependent photosusceptibility for this phenomenon. Here, we make use of a newly developed nonlinear optical device, which generates widely tunable high-intensity femtosecond pulses, to excite YBa2Cu3O6.5 throughout the entire optical spectrum (3–750 THz). In the far-infrared region (3–24 THz), signatures of nonequilibrium superconductivity are induced only for excitation of the 16.4- and 19.2-THz vibrational modes that drive c-axis apical oxygen atomic positions. For higher driving frequencies (25–750 THz), a second resonance is observed around the charge transfer band edge at approximately 350 THz. These findings highlight the importance of coupling to the electronic structure of the CuO2 planes, mediated either by a phonon or by charge transfer.

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Language(s): eng - English
 Dates: 2020-01-132019-05-192020-01-272020-03-03
 Publication Status: Published online
 Pages: -
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 Rev. Method: Peer
 Identifiers: arXiv: 1905.08356
DOI: 10.1103/PhysRevX.10.011053
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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) via the Cluster of Excellence ‘The Hamburg Centre for Ultrafast Imaging’ (EXC 1074—Project ID 194651731) and the priority program SFB925.
Grant ID : 319286
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)

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Title: Physical Review X
  Abbreviation : Phys. Rev. X
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 10 (1) Sequence Number: 011053 Start / End Page: - Identifier: Other: 2160-3308
CoNE: https://pure.mpg.de/cone/journals/resource/2160-3308