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small polaron

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small polaron [′smȯl ′pō·lə‚rän]
(solid-state physics)
A quasiparticle comprising a self-trapped electronic charge localized within a small region of a solid of spatial extent comparable to an interatomic dimension, and the atomic displacement pattern which produces the potential well within which the charge is bound.


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s] is the activation energy for TEP, [alpha] is a constant and [alpha] < 1 suggests that the conductivity is small polaron hopping, whereas for [alpha] > 2, conductivity is due to large polarons, and k is the Boltzmann constant.
 
 
 
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