Ultrafast dynamics of charge density waves in 4H(b)-TaSe2 probed by femtosecond electron diffraction.

@article{Erasmus2012UltrafastDO,
  title={Ultrafast dynamics of charge density waves in 4H(b)-TaSe2 probed by femtosecond electron diffraction.},
  author={Nicolas Erasmus and Maximilian Eichberger and Kerstin Haupt and Ilana Boshoff and G{\"u}nther Horst Kassier and R Birmurske and Helmuth Berger and Jure Dem{\vs}ar and Heinrich Schwoerer},
  journal={Physical review letters},
  year={2012},
  volume={109 16},
  pages={
          167402
        }
}
The dynamics of the photoinduced commensurate-to-incommensurate charge density wave (CDW) phase transition in 4H(b)-TaSe(2) are investigated by femtosecond electron diffraction. In the perturbative regime, the CDW re-forms on a 150-ps time scale, which is two orders of magnitude slower than in other transition-metal dichalcogenides. We attribute this to a weak coupling between the CDW carrying T layers and thus demonstrate the importance of three-dimensionality for the existence of CDWs. With… Expand
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