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Homework Help: Kittel chapter 8

  1. Mar 8, 2008 #1
    1. The problem statement, all variables and given/known data
    This question refers to Kittel's solid-state physics book.

    I am confused the split-off band, the longitudinal mass, and the transverse mass that Kittel starts talking about on page 202 in the section about Silicon and Germanium.
    Can explain what these terms mean? Thanks.

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Mar 10, 2008 #2
    At a guess (I don't have the book), longitudinal mass is the effective mass of longitudinal waves and similarly for transverse mass.
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