Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High Field Mobility and Diffusivity of Electron Gas in Silicon Devices   In this paper the Boltzmann equation describing the carrier transport in a
semiconductor is considered. A modified Chapman-Enskog method is used, in order
to find approximate solutions in the weakly non-homogeneous case. These
solutions allow to calculate the mobility and diffusion coefficients as
function of the electric field. The integral-differential equations derived by
the above method are numerically solved by means of a combination of spherical
harmonics functions and finite-difference operators. The Kane model for the
electron band structure is assumed; the parabolic band approximation is
obtained as a particular case. The numerical values for mobility and
diffusivity in a silicon device are compared with the experimental data. The
Einstein relation is also shown.

27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
16
The categories of this paper are: stat