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Ultrafast electronic dynamics in laser-excited crystalline bismuth

Journal of Applied Physics, ISSN: 0021-8979, Vol: 114, Issue: 3
2013
  • 18
    Citations
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    Usage
  • 38
    Captures
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Metrics Details

  • Citations
    18
    • Citation Indexes
      18
  • Captures
    38

Article Description

Femtosecond spectroscopy is applied to study transient electronic processes in bismuth. The components with relaxation times of 1 ps, 7 ps, and ∼1 ns are detected in the photoinduced reflectivity response of the crystal. To facilitate assignment of the observed relaxation to the decay of particular excited electronic states, we use pump pulses with central wavelengths ranging from 400 to 2300 nm. Additionally, we examine the variation of parameters of coherent A phonons upon the change of excitation and probing conditions. Data analysis reveals significant wavevector dependence of electron-hole and electron-phonon coupling strength along Γ-T direction of the Brillouin zone. © 2013 AIP Publishing LLC.

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