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Momentum Relaxation Time

  1. Nov 17, 2009 #1
    What is a "momentum relaxtion time"? Tried googling it but couldn't get any definitions.

    Comes from the sentence in a paper on silicon semiconductors:
    "the momentum relaxation times lies in the subpicosecond regime...as a result free carriers can follow oscillations of an optical wave almost instantaneously..."
     
  2. jcsd
  3. Nov 17, 2009 #2
    It is the average time a carrier loses its original momentum due to a scattering event.
     
  4. Nov 17, 2009 #3
    seems understandable.

    thanks.
     
  5. Nov 17, 2009 #4
    Last edited by a moderator: Apr 24, 2017
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