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

Matteo Mitrano, Sangjun Lee, Ali A. Husain, Minhui Zhu, Gilberto De La Peña Munoz, Stella X.L. Sun, Young Il Joe, Alexander H. Reid, Scott F. Wandel, Giacomo Coslovich, William Schlotter, Tim Van Driel, John Schneeloch, G. D. Gu, Nigel Goldenfeld, Peter Abbamonte

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article number205125
JournalPhysical Review B
Volume100
Issue number20
DOIs
StatePublished - Nov 18 2019
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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