Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recombination and Lifetimes of Charge Carriers in Semiconductors   In this Communication, it is shown that models used for describing generation
and recombination of electrons and holes lead to disagreements with Maxwell's
electrodynamics. Self-consistent expressions, more adequately depicting the
actual physical processes of electron-hole recombination in semiconductors are
obtained. It is shown that the electron and hole lifetimes can be defined
correctly only for the special cases when the electron and hole nonequilibrium
concentrations are the same, these lifetimes being equal. The influence of
temperature inhomogeneity on the recombination is also considered. The
recombination rate for hot electrons is obtained in the case when the electron
and hole temperatures differ.

29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph