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Why electrical current is possible only with the presence of energy BANDs, rather than discrete energy levels.
Thank you.
Thank you.
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Change of energy would mean change of energy level (principal quantum number), as far as I understand, electrical current is due to jump of electrons within degenerate states, that's why electrical current possible in metals and not in insulators (without changing of energy level).yehokhenan said:The electron can change its state by acquiring energy from somewhere.
An energy level that can get occupied by an electron.Goodver said:What is meant by the state then?
The number of electrons compared to the number of available energy levels.Goodver said:And what determines when the band is fully packed and when not?
The gap does not have to exist.Goodver said:As far as I understand, electrons can be in one of the energy bands which are separated by energy gaps (Kronig Penney model).