Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sign-reversal electron magnetization in Mn-doped semiconductor
  structures   The diversity of various manganese types and its complexes in the Mn-doped
${\rm A^{III}B^V}$ semiconductor structures leads to a number of intriguing
phenomena. Here we show that the interplay between the ordinary substitutional
Mn acceptors and interstitial Mn donors as well as donor-acceptor dimers could
result in a reversal of electron magnetization. In our all-optical scheme the
impurity-to-band excitation via the Mn dimers results in direct orientation of
the ionized Mn-donor $d$ shell. A photoexcited electron is then captured by the
interstitial Mn and the electron spin becomes parallel to the optically
oriented $d$ shell. That produces, in the low excitation regime, the
spin-reversal electron magnetization. As the excitation intensity increases the
capture by donors is saturated and the polarization of delocalized electrons
restores the normal average spin in accordance with the selection rules. A
possibility of the experimental observation of the electron spin reversal by
means of polarized photoluminescence is discussed.

15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an