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Valence electrons in insulators

by Superposed_Cat
Tags: electrons, insulators, valence
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Superposed_Cat
#1
Oct22-13, 09:09 AM
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I was wondering why the valence electrons aren't free to move in insulators? Thanks for any help in advance.
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UltrafastPED
#2
Oct22-13, 09:55 AM
Sci Advisor
Thanks
PF Gold
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Takes too much energy to reach the conduction band.

For a diagram etc. see http://hyperphysics.phy-astr.gsu.edu...s/band.html#c2
DrDu
#3
Oct22-13, 10:03 AM
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See also this discussion further down on this page:

http://www.physicsforums.com/showthread.php?t=715010

hokhani
#4
Oct30-13, 06:35 PM
P: 269
Valence electrons in insulators

Quote Quote by Superposed_Cat View Post
I was wondering why the valence electrons aren't free to move in insulators? Thanks for any help in advance.
In fact they move with their group velocities but since the band is full, movement of the electron at k would neutralize the movement of another one at -k.


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