Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inter-Landau-level skyrmions versus quasielectrons in the nu=2 quantum
  Hall effect   We consider the charged excitations in the quantum Hall effect with a large
Zeeman splitting at filling factor nu=2. When the Zeeman splitting is increased
over a critical value the groundstate undergoes a first order phase transition
from a paramagnetic to a ferromagnetic phase. We have studied the possibility
to form charged spin-textured excitations, "inter Landau level Skyrmions",
close to this transition and find that these never are the lowest lying charged
excitations but can under certain conditions provide an effective driving
mechanism for the paramagnetic to ferromagnetic phase transition. We show that
the charged excitations inevitably present in the system can act as nucleation
centers even at T=0 and hence set a specific limit for the maximal hysteresis
attainable in this case. Calculations of how the finite width of the
two-dimensional electron gas affects the nu=2 phase transition and the
polarization at higher filling factors are also presented.

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The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
17
The categories of this paper are: q-fin