Boundary Conditions for Fermi Gas

  • Thread starter plxmny
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  • #1
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Hi

I am new to solid state. I just read about fermi gas in a cube. For some reason the author used periodic boundary conditions? Why didn't they choose finite well potential where the height of the well is related to the work function?
 

Answers and Replies

  • #2
76
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Periodic boundary conditions allow you to calculate properties for infinite systems which is more appropriate than just making a large box. This is the basis for the band theory of solids.
 

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