Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Derivation of Electron Spin Relaxation Rate by Electron-Phonon
  Interaction Using a New Diagram Method   A formula for the electron spin relaxation rate of an electron-phonon system
is derived using a new spring-loop diagram method. The result contains the
distribution functions for the electrons and phonons properly. Therefore, all
the spin flip and conserving processes are explained from a microscopic point
of view, and a physical insight of the quantum dynamics of electron spin in a
solid is obtained from the diagram. Photons and phonons are classified
according to the spin flip and conserving processes. The formula is used to
calculate the electron spin relaxation rate in GaAs. The temperature dependence
of the relaxation rate is obtained by a comparison with the experimental
result.

11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio