Old Nick said:I'm not sure, but I'd imagine it was due to the differing mobilities of electrons and holes (and also I believe with sub-atomic particles the meanings of things such as mass and energy get a bit fuzzy). Thus, under the same applied force, and electron will have greater acceleration than a hole, which leads to the conclusion that the hole must have more mass, F = ma.
nandinichakrab said:but here i also want to know, whether the mass (not the effective mass) of the hole is said to be more than that of an electron.why is it so? bcoz holes and electrons should hav same mass. again holes should not be confused with protons, bcoz protons are real particles, but holes are hypothetical. and the mobility of the holes is less because the mass of holes are considered to be more.plz help.
nandinichakrab said:ok, the air bubble while going up experiences both gravitational force and also the viscous force. the drop of water falling under the effect of gravity only experiences the resistance offered by the air. and also we know that the density of water is more than that of air.so the water drop falls faster.
nandinichakrab said:but here i also want to know, whether the mass (not the effective mass) of the hole is said to be more than that of an electron.why is it so?
timof said:nandinichakrab said:ok, the air bubble while going up experiences both gravitational force and also the viscous force. the drop of water falling under the effect of gravity only experiences the resistance offered by the air. and also we know that the density of water is more than that of air.so the water drop falls faster.
In a somewhat similar fashion, the crystal lattice has different effect (you can think of friction, but in reality this is a quantum mechanical effect) on electrons in the valence band and in the conduction band, so it's not surprising that effective masses of electrons and holes are different.
A hole is an imaginary particle that is used to make the math work.
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