1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Kittel page 174

  1. Feb 29, 2008 #1
    1. The problem statement, all variables and given/known data
    This question refers to Kittel's solid-state physics book.

    On this page, in the section about the "Kronig-Penney Model in Reciprocal Space", I do not understand why the sum over s is from 0 to 1/a. What if a is 2?

    Also, how do they know that "the boundary conditions are periodic over a ring of unit length"?

    2. Relevant equations



    3. The attempt at a solution
     
    Last edited: Feb 29, 2008
  2. jcsd
  3. Mar 1, 2008 #2

    malawi_glenn

    User Avatar
    Science Advisor
    Homework Helper

    Then you only sum over zero.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Kittel page 174
  1. Zwiebach pages 174-175 (Replies: 18)

  2. Kittel page 109 (Replies: 11)

  3. Kittel page 112 (Replies: 1)

Loading...