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Pressure tuning of light-induced superconductivity in K3C60.

ABSTRACT: Optical excitation at terahertz frequencies has emerged as an effective means to dynamically manipulate complex materials. In the molecular solid K3C60, short mid-infrared pulses transform the high-temperature metal into a non-equilibrium state with the optical properties of a superconductor. Here we tune this effect with hydrostatic pressure and find that the superconducting-like features gradually disappear at around 0.3 GPa. Reduction with pressure underscores the similarity with the equilibrium superconducting phase of K3C60, in which a larger electronic bandwidth induced by pressure is also detrimental for pairing. Crucially, our observation excludes alternative interpretations based on a high-mobility metallic phase. The pressure dependence also suggests that transient, incipient superconductivity occurs far above the 150 K hypothesised previously, and rather extends all the way to room temperature.

SUBMITTER: Cantaluppi A

PROVIDER: S-EPMC6071848 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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Pressure tuning of light-induced superconductivity in K3C60.

Cantaluppi A A Buzzi M M Jotzu G G Nicoletti D D Mitrano M M Pontiroli D D Riccò M M Perucchi A A Di Pietro P P Cavalleri A A

Nature physics 20180507 8

Optical excitation at terahertz frequencies has emerged as an effective means to dynamically manipulate complex materials. In the molecular solid K3C60, short mid-infrared pulses transform the high-temperature metal into a non-equilibrium state with the optical properties of a superconductor. Here we tune this effect with hydrostatic pressure and find that the superconducting-like features gradually disappear at around 0.3 GPa. Reduction with pressure underscores the simila ...[more]

PMID: 30079096

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