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  Evidence for metastable photo-induced superconductivity in K3C60

Budden, M., Gebert, T., Buzzi, M., Jotzu, G., Wang, E., Matsuyama, T., et al. (2021). Evidence for metastable photo-induced superconductivity in K3C60. Nature Physics, 17(5), 611-618. doi:10.1038/s41567-020-01148-1.

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Supplementary information ("Supplementary Sections 1–13, including figures" (pdf)) & Source data (6x "Numerical data used to generate graphs in the figures" (csv))
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https://arxiv.org/abs/2002.12835 (Preprint)
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https://dx.doi.org/10.1038/s41567-020-01148-1 (Publisher version)
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https://dx.doi.org/10.1038/s41567-021-01168-5 (Supplementary material)
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News & Views article "Stay just a little bit longer" by Anshul Kogar

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 Creators:
Budden, M.1, Author              
Gebert, T.1, Author              
Buzzi, M.1, Author              
Jotzu, G.1, Author              
Wang, E.1, Author              
Matsuyama, T.2, Author              
Meier, G.2, Author              
Laplace, Y.1, Author              
Pontiroli, D.3, Author
Riccò, M.3, Author
Schlawin, F.4, Author
Jaksch, D.4, Author
Cavalleri, A.1, 4, 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              
2Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2074323              
3Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università degli Studi di Parma, ou_persistent22              
4Department of Physics, Clarendon Laboratory, University of Oxford, ou_persistent22              

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 Abstract: Excitation of high-Tc cuprates and certain organic superconductors with intense far-infrared optical pulses has been shown to create non-equilibrium states with optical properties that are consistent with transient high-temperature superconductivity. These non-equilibrium phases have been generated using femtosecond drives, and have been observed to disappear immediately after excitation, which is evidence of states that lack intrinsic rigidity. Here we make use of a new optical device to drive metallic K3C60 with mid-infrared pulses of tunable duration, ranging between one picosecond and one nanosecond. The same superconducting-like optical properties observed over short time windows for femtosecond excitation are shown here to become metastable under sustained optical driving, with lifetimes in excess of ten nanoseconds. Direct electrical probing, which becomes possible at these timescales, yields a vanishingly small resistance with the same relaxation time as that estimated by terahertz conductivity. We provide a theoretical description of the dynamics after excitation, and justify the observed slow relaxation by considering randomization of the order-parameter phase as the rate-limiting process that determines the decay of the light-induced superconductor.

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Language(s): eng - English
 Dates: 2020-06-272020-12-112021-02-042021-05
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2002.12835
DOI: 10.1038/s41567-020-01148-1
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Grant ID : 319286
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)

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Title: Nature Physics
  Other : Nat. Phys.
Source Genre: Journal
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Publ. Info: London : Nature Pub. Group
Pages: - Volume / Issue: 17 (5) Sequence Number: - Start / End Page: 611 - 618 Identifier: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850