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Fermi Energy & Optical Transitions

  1. May 3, 2010 #1
    Hello,

    I have a question which has something to do with band structures etc:

    A two dimensional solid has two electrons per unit cell. The crystal potential is weak and the solid behaves like a free electron metal.

    Estimate the threshold for interband optical transitions in terms of the fermi energy.


    I have no idea where to begin with this really. Any help would be appreciated.

    Thanks

    Ian
     
  2. jcsd
  3. May 4, 2010 #2


    How much physics have you done?

    Do you know the physics behind free electron metals?
     
  4. May 4, 2010 #3
    I found an answer now. It was to do with band structure. Thanks for trying to help.

    Ian
     
  5. May 5, 2010 #4
    How did you calculate it in the end?
     
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