Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metastable bound states of the of the interacting 2D magnetoexcitons   The possible formation of two-dimensional (2D) magnetic bi-excitons composed
of two 2D magnetoexcitons with electrons and holes on the lowest Landau levels
(LLLs), with opposite center of- mass wave vectors k and and with antiparallel
electric dipole moments perpendicular to the corresponding wave vectors was
investigated. Two spinor structures of two electrons and of two holes were
considered. In the singlet-singlet state the spins of two electrons as well as
the effective spins of two holes create the combinations with the total spin
S=0 and its projection on the magnetic field The triplet-triplet state
corresponds to S=1. Two orbital Gaussian variational wave functions depending
on | k | and describing the relative motion of two magnetoexcitons inside the
molecule were used. It is shown that in the LLLs approximation the stable bound
states of bimagnetoexcitons do not exist. A metastable bound state for the
triplet-triplet spin configuration a metastable bound state with the orbital
wave function, having the maximum on the in-plane ring was revealed. The
metastable bound state has an energy activation barrier comparable with the
magnetoexciton ionization potential and gives rise to the new luminescence band
due to the metastable bi-exciton-para exciton conversion with the frequencies
higher than those of the para magnetoexciton luminescence line.

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The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph