Theory for displacive excitation of coherent phonons.

@article{Zeiger1992TheoryFD,
  title={Theory for displacive excitation of coherent phonons.},
  author={Zeiger and J. Jordana Vidal and Gongzhen Cheng and Erich P. Ippen and Mildred S. Dresselhaus},
  journal={Physical review. B, Condensed matter},
  year={1992},
  volume={45 2},
  pages={
          768-778
        }
}
We report femtosecond time-resolved pump-probe reliection experiments in semimetals and semiconductors that show large-amplitude oscillations with periods characteristic of lattice vibrations. Only A& modes are detected, although modes with other symmetries are observed with comparable intensity in Raman scattering. We present a theory of the excitation process in this class of materials, which we refer to as displacive excitation of coherent phonons (DECP). In DECP, after excitation by a pump… CONTINUE READING

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