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Optical homogeneous linewidths in glasses in the framework of the soft-potential model

Physical Review B - Condensed Matter and Materials Physics, ISSN: 1550-235X, Vol: 56, Issue: 2, Page: 579-592
1997
  • 18
    Citations
  • 0
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  • 15
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Metrics Details

  • Citations
    18
    • Citation Indexes
      18
  • Captures
    15

Article Description

The temperature dependence of the optical linewidth of an impurity embedded in a glass matrix is investigated. A model Hamiltonian that couples the impurity to the soft modes characteristic of glasses in the phonon field of the matrix is introduced. We find an excellent agreement between our model predictions and experimental data. We are also able to reproduce supralinear behaviors in the low-temperature regime without any adjustable parameter for the density of states. Finally, the quadratic behavior extending to very low temperatures is explained in terms of the Bose peak equivalent temperature. © 1997 The American Physical Society.

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