Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Elementary electronic excitation from a two-dimensional hole gas in the
  presence of spin-orbit interaction   We present a theoretical study of the elementary electronic excitation
associated with plasmon modes in a two-dimensional hole gas (2DHG) in the
presence of spin-orbit (SO) interaction induced by the Rashba effect. The
calculation is carried out using a standard random-phase-approximation
approach. It is found that in such a spintronic system, plasmon excitation can
be achieved via intra- and inter-SO electronic transitions around the Fermi
level. As a result, the intra- and inter-SO plasmon modes can be observed. More
importantly, the plasmon modes induced by inter-SO transition are optic-like
and these modes can be directly applied to identify the Rashba spin splitting
in 2DHG systems through optical measurements. The interesting features of the
plasmon excitation in a spin split 2DHG are analyzed and discussed in details.
Moreover, the results obtained for a 2DHG are compared with those obtained for
a spin-splitting 2DEG reported very recently.

16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math