Laser-Induced Charge-Density-Wave Transient Depinning in Chromium

V. Jacques; C. Laulhé; N. Moisan; S. Ravv; D. Le Bolloc'h

doi:10.1103/PhysRevLett.117.156401

Laser-Induced Charge-Density-Wave Transient Depinning in Chromium

Strongly Correlated Electrons 2025-01-08 v2

Authors: V. Jacques , C. Laulhé , N. Moisan , S. Ravv , D. Le Bolloc'h

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Abstract

We report here on time-resolved x-ray diffraction measurements following femtosecond laser excitation in pure bulk chromium. Comparing the evolution of incommensurate charge-density-wave (CDW) and atomic lattice reflections, we show that, few nanoseconds after laser excitation, the CDW undergoes different structural changes than the atomic lattice. We give evidence for a transient CDW shear strain that breaks the lattice point symmetry. This strain is characteristic of sliding CDWs, as observed in other incommensurate CDW systems, suggesting the laser-induced CDW sliding capability in 3D systems. This first evidence opens perspectives for unconventional laser-assisted transport of correlated charges.

Keywords

charge-density-wave femtosecond laser excitation chromium x-ray diffraction transient depinning sliding CDW shear strain

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@article{arxiv.1612.05068,
  title  = {Laser-Induced Charge-Density-Wave Transient Depinning in Chromium},
  author = {V. Jacques and C. Laulhé and N. Moisan and S. Ravv and D. Le Bolloc'h},
  journal= {arXiv preprint arXiv:1612.05068},
  year   = {2025}
}

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4 pages with 4 figures + supplemental material with 4 figures, Published in Phys. Rev. Lett. 2016

Laser-Induced Charge-Density-Wave Transient Depinning in Chromium

Abstract

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