Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temperature dependence of the spin relaxation in highly degenerate ZnO
  thin films   Zinc oxide is a wide-bandgap semiconductor which is considered a potential
candidate for fabricating next-generation transparent spintronic devices.
However, before this can be practically achieved, a thorough, scientific
understanding of the various spin transport and relaxation processes undergone
in this material is essential. In the present paper we report our
investigations into these processes via temperature dependent, non-local Hanle
experiments. Epitaxial ZnO thin films were deposited on c-axis sapphire
substrates using a pulsed laser deposition technique. Careful structural,
optical, and electrical characterizations of the films were performed.
Temperature dependent Hanle measurements were carried out, using an
all-electrical scheme for spin injection and detection, in a non-local geometry
over the temperature range of 20 - 300 K. Carrier concentration in these films,
as determined by Hall effect measurements, was found to be of the order of
10^19 cm^-3. It was determined that in such a degenerately doped system it is
essential to use Fermi-Dirac statistics to explain the transport of carriers in
the system. From the Hanle data, spin relaxation time in the ZnO films was
determined at different temperatures. Our analysis of the temperature-dependent
spin relaxation time data suggests that the dominant mechanism of spin
relaxation in ZnO films is the Dyakonov-Perel (DP) mechanism modified for the
wurtzite crystalline structure in which a hexagonal c-axis reflection asymmetry
is present. As a result of this modification the spin-relaxation rate is
linear-in-momentum.

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The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn