e***i
发帖数: 58 | 1 Is it possible that at one temperature, by changing magnetic field, the
conduction type can be changed ? Like, low field, it is measured n type, and
at high field, it is p-type.
Magnetic field can change mobility. If the affects on minority and majority
carriers' mobility are different, the overall conduction type can be changed
, is it right?
If anyone knows, would you please give me paper as reference?
thanks | n*****g
发帖数: 626 | 2 I used to work on QHE 10 plus years ago.
The answer depends on the temperature, the magnetic field and material.
It is very likely the managetic field is shifting the Fermi level of the
electron gas -- the Fermi level could be in either the p-type band or
the n-type band depending on the strength of magnetic field.
You may google for the references. |
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