Journal
APPLIED PHYSICS LETTERS
Volume 85, Issue 9, Pages 1535-1537Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1776335
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We present an ab initio description of charge-carrier mobilities in organic molecular crystals of high purity. Our approach is based on Holstein's original concept of small-polaron bands but generalized with respect to the inclusion of nonlocal electron-phonon coupling. By means of an explicit expression for the mobilities as a function of temperature in combination with ab initio calculations of the material parameters, we demonstrate the predictive power of our theory by applying it to naphthalene. The results show a good qualitative agreement with experiment and provide insight into the difference between electron and hole mobilities as well as their peculiar algebraic and anisotropic temperature dependencies. (C) 2004 American Institute of Physics.
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