Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of small-polaron band conduction in ultrapure organic crystals   We present a novel theory 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. We derive an explicit expression for the
mobilities as a function of temperature and, using ab-initio methods to obtain
the material parameters, we demonstrate its predictive power by applying it to
naphthalene. The results show a remarkably good agreement with experiments and
provide new insight into the difference between electron and hole mobilities as
well as their peculiar algebraic and anisotropic temperature dependences.

36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc