Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Frequency-dependent complex conductivity of an organic thin-film
  transistor   We measure the complex impedance between source/drain electrodes and the gate
electrode of a pentacene thin-film transistor (TFT) at frequencies 50 Hz <
omega/2pi < 20 kHz. Modeling the TFT as a distributed RC network (RC
transmission line), we find that the data cannot be explained by a model
including only a real, frequency-independent sheet conductivity. Instead, we
use the RC transmission line model to extract the frequency-dependent complex
sheet conductivity sigma(omega) = sigma'(omega) + jsigma"(omega) of the
pentacene film. At high frequencies, sigma(omega) increases with frequency,
sigma'(omega) and sigma"(omega) become similar in magnitude, and the on/off
ratio is significantly reduced.

30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci