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Homework Help: Density of states

  1. Nov 13, 2008 #1
    1. The problem statement, all variables and given/known data

    We study a one dimensional metal with length L at 0 K, and ignore the electron spin. Assume that the electrons do not interact with each other. The electron states are given by

    [tex]\psi(x) = \frac{1}{\sqrt{L}}exp(ikx), \psi(x) = \psi(x + L) [/tex]

    What is the density of states at the Fermi level for this metal?

    3. The attempt at a solution

    The total energy of the system is [tex]E = \frac{\hbar^{2}\pi^{2}n^{2}}{2mL^{2}}[/tex] where n is the square of the sums of the three quantum numbers that determine each quantum state.

    At a certain energy all states up to [tex]E_{F}(0)=E_{0}n^{2}_{F}[/tex] is filled.
    Last edited: Nov 13, 2008
  2. jcsd
  3. Nov 15, 2008 #2
    No ideas?
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