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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. (2020). Evidence for metastable photo-induced superconductivity in K3C60.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-C404-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-C405-8
Genre: Paper

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2002.12835.pdf (Preprint), 6MB
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2002.12835.pdf
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https://arxiv.org/abs/2002.12835 (Preprint)
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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: Far and mid infrared optical pulses have been shown to induce non-equilibrium unconventional orders in complex materials, including photo-induced ferroelectricity in quantum paraelectrics, magnetic polarization in antiferromagnets and transient superconducting correlations in the normal state of cuprates and organic conductors. In the case of non-equilibrium superconductivity, femtosecond drives have generally resulted in electronic properties that disappear immediately after excitation, evidencing a state that lacks 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 becomes possible at these timescales, yielding a vanishingly small resistance. Such a colossal positive photo-conductivity is highly unusual for a metal and, when taken together with the transient optical conductivities, it is rather suggestive of metastable light-induced superconductivity.

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Language(s): eng - English
 Dates: 2020-02-28
 Publication Status: Published online
 Pages: 35
 Publishing info: -
 Table of Contents: -
 Rev. Method: No review
 Identifiers: arXiv: 2002.12835
 Degree: -

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