Evidence for photoinduced sliding of the charge-order condensate in La1.875Ba0.125CuO4

Article

关键词: X-RAY;    SUPERCONDUCTIVITY;   

DOI  :  10.1103/PhysRevB.100.205125

来源: SCIE

【 摘 要 】

We use femtosecond resonant soft x-ray scattering to measure the ultrafast optical melting of charge-order correlations in La1.875Ba0.125CuO4. By analyzing both the energy-resolved and the energy-integrated order-parameter dynamics, we find evidence of a short-lived nonequilibrium state, the features of which are compatible with a sliding charge-density wave coherently set in motion by the pump. This transient state exhibits shifts in both the quasielastic line energy and its wave vector, as expected from a classical Doppler effect. The wave-vector change is indeed found to directly follow the pump propagation direction. These results demonstrate the existence of sliding charge-order behavior in an unconventional charge-density wave system and underscore the power of ultrafast optical excitation as a tool to coherently manipulate electronic condensates.

【 授权许可】

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