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. 2011 Jan 14;331(6014):189-91.
doi: 10.1126/science.1197294.

Light-induced superconductivity in a stripe-ordered cuprate

D Fausti  1 , R I Tobey, N Dean, S Kaiser, A Dienst, M C Hoffmann, S Pyon, T Takayama, H Takagi, A Cavalleri
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Light-induced superconductivity in a stripe-ordered cuprate

D Fausti et al. Science. .

Abstract

One of the most intriguing features of some high-temperature cuprate superconductors is the interplay between one-dimensional "striped" spin order and charge order, and superconductivity. We used mid-infrared femtosecond pulses to transform one such stripe-ordered compound, nonsuperconducting La(1.675)Eu(0.2)Sr(0.125)CuO(4), into a transient three-dimensional superconductor. The emergence of coherent interlayer transport was evidenced by the prompt appearance of a Josephson plasma resonance in the c-axis optical properties. An upper limit for the time scale needed to form the superconducting phase is estimated to be 1 to 2 picoseconds, which is significantly faster than expected. This places stringent new constraints on our understanding of stripe order and its relation to superconductivity.

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