1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Homework Help: 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


    User Avatar
    2017 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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook