Posted by MRH on February 23, 2014, 9:11 pm
How do Holes explain the anomalous sign of some measurements of the hall voltage? Electrons are the physical carriers of charge, and so any current that can be thought of as a single hole moving, must be equivalent to a long chain of electrons hopping. Holes seem, at the moment, to be a useful mathematical tool for calculating quantities for a saturated valence band, rather than a reality.
I suspect a related issue is 'How to calculate the no. of charge carriers in a doped semi-conductor?' In an undoped semi-conductor, it seems fairly clear, just use the no. of electrons in the conduction band. But when the holes and electrons are not in balance, what to use?
I hope someone else asks another question soon...this page will be full of my questions before long.
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