Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What is the momentum of an electron?

  1. Jul 30, 2012 #1
    I was learning about indirect band gap and it says that when the electron comes down from upper energy level to lower energy level it emits photon(which I can understand) but in order to conserve the momentum it emits phonons (which I couldn't understand).

    Can you please help me with this?

    Thanks a lot.
     
  2. jcsd
  3. Jul 30, 2012 #2
    Try wikipedia here:

    http://en.wikipedia.org/wiki/Indirect_band_gap

    Note the diagrams near the top of the page.....

    I don't know much about phonon quasi particles except that they are associated with vibrating structures like lattices.....

    Is this your situation??.....read further along in the wiki article and note

     
    Last edited: Jul 30, 2012
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: What is the momentum of an electron?
Loading...