Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Negative polarizability of 2D electrons in HgTe quantum well   The polarizability of electrons occupying the lowest subband of spatial
quantization in CdTe/Cd$_x$Hg$_{1-x}$Te/CdTe quantum wells is calculated. It is
shown that polarizability in the quantum well without cadmium is negative,
i.e., the displacement of an electron in an electric field applied
perpendicularly to the quantum well plane is opposite to the force acting on
it. The negative polarizability of 2D electrons can reduce the dielectric
constant of quantum wells by up to $(10-15)$ percent.

31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga