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    Light-Induced Charge Order Mode in a Metastable Cuprate Ladder

    Hari Padma1,2,*, Prakash Sharma3, Sophia F. R. TenHuisen1,4, Filippo Glerean1,†, Antoine Roll5, Pan Zhou3, Sarbajaya Kundu6,7, Arnau Romaguera8, Elizabeth Skoropata8 et al.

    Hiroki Ueda8, Biaolong Liu8, Eugenio Paris8, Yu Wang9,10, Seng Huat Lee9,10, Zhiqiang Mao9,10, Mark P. M. Dean5, Edwin W. Huang6,7, Elia Razzoli8, Yao Wang3, and Matteo Mitrano1,‡

    • *Contact author: hari.padma@case.edu
    • †Present address: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York, USA.
    • ‡Contact author: mmitrano@g.harvard.edu

    Phys. Rev. Lett. 136, 196501 – Published 11 May, 2026

    DOI: https://doi.org/10.1103/wdcf-jly6

    Abstract

    We report the observation of an emergent charge order mode in the optically excited cuprate ladder Sr14Cu24O41. Near-infrared light in the ladder plane drives a symmetry-protected electronic metastable state together with a partial melting of the equilibrium charge order. Our time-resolved resonant inelastic x-ray scattering measurements at the upper Hubbard band reveal a collective excitation dispersing from the charge order wave vector up to 0.8 eV with a slope on the order of the quasiparticle velocity. These findings reveal a regime where correlated carriers acquire itinerant character at finite momentum, and charge order becomes dynamically fluctuating, offering a platform to explore light-induced pairing instabilities.

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