Why isn't a hole created in absence of electrons due to intra band transition in the metals?
Dear Shankar ,
I know but why does not hole create in absence of electrons due to intra band transition in the metals?
Because there is no band gap. Look at the band theory of solids.
Dear Leszek ,
you right but we have intraband transition in the metals.now why does not hole create in absence level of electrons due to intra band transition in the metals?
in metal there is no intraband transition because abundant conduction electron are present in conduction band which is overlapped with valence band.
Dear Rohit ,
as I know in metals there is intraband transition because conduction band is overlapped with valence band but there is not interband transition while in the semiconductors there is interband transition .please read book :(Electronic Properties of Materials
By Rolf E. Hummel).
Regards,
Abbas
Dear Rohit ,
interband transition is different from intraband transition .
Regards,
Abbas
Dear Abbas Rahdar
i got your point therefore you can say that absence of energy band gap is one of the resign in metal no hole there.
Citing from the web: "Vacancy of electron created in the valance band of solid due to the upward transition of electron is called hole. In case of semiconductor valance and conduction bands are separated by a gap and hence electron can make transition and hole created.
But in case of metal the valance and conduction band overlap with each other, hence valance electron need not have to leave valance band to participate in conduction. It can do so only by changing its energy level and hence holes are not generated in metals."
Dear Leszek,
is it possible changing its energy level without place change?
Regards,
Abbas
my meaning if change the energy level then should change electron its location and the location change means blank state (similar hole )
The electron "location" is its energy level. Everything is happens in the energy "space". (compare with diagrams of band theory of semiconductors; the upward axis in the diagrams is energy).
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