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William Beaty wrote:
In truth, a hole acts to "expose" the positive charge of the
silicon's protons which normally would be canceled out.
It's easy to concentrate on the emptiness of the "hole"
while forgetting that a hole is most definitely a positive
charge carrier.
Ludwid Kowalski wrote:
After being satisfied with the explanation of the "positivity
of holes" I started thinking about it and I am less satisfied.
All materials are made of atoms, systems containing
charged particles (electrons and protons). We learn that
there are no particles called holes, unless the "emptiness",
full of fields, is treated as a set of holes.