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Number of states in a band

  1. Jan 26, 2013 #1
    A rectangular semiconductor has dimensions of 2x2x1 mm, the unit cell is cubic and has edge length of 2 angstroms. find the number of states in one band of this semiconductor.


    What I have done:

    volume of unit cell = (2x10^7)^3 = 8x10^-21 mm^3
    volume of semi conductor = 4 mm^3
    number of cells = 4/8x10^-21 = 5X10^20
    max number of electrons in one energy band = 2 x number of cells

    how do you find the number of states in one band
     
  2. jcsd
  3. Jan 26, 2013 #2

    mfb

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    2016 Award

    Staff: Mentor

    Each electron can fill one state, so if you know the maximal number of electrons in a band, you have the number of states in that band.
     
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