1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Solid State - Energy(position)

  1. Nov 6, 2012 #1
    1. The problem statement, all variables and given/known data
    I have an energy function as follows:
    [itex] E = \dfrac{\hbar^2}{2m_e}k_x^2+E_0\left(n_y^2+1\right)[/itex]
    Where [itex] E_0 = \dfrac{\pi^2\hbar^2}{2m_eL_z}[/itex]
    I am asked to plot this energy for [itex]x\in ]-L_z/2;L_z/2[ [/itex]
    I know everything but not the relation between k and x?.

    3. The attempt at a solution
    I Fourier transform the energy from x to k-space(momentum space) and get some dela functions in k multiplied on as one would expect, but this seems odd to me and I want to know:
    What is the relation between k and x?
  2. jcsd
  3. Nov 6, 2012 #2
    Follow up:
    Maybe I shall choose some k and just plot a constant, but it seems silly.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook