Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetization curves and low-temperature thermodynamics of two spin-1/2
  Heisenberg edge-shared tetrahedra   A full energy spectrum, magnetization and susceptibility of a spin-1/2
Heisenberg model on two edge-shared tetrahedra are exactly calculated by
assuming two different coupling constants. It is shown that a ground state in
zero field is either a singlet or a triplet state depending on a relative
strength of both coupling constants. Low-temperature magnetization curves may
exhibit three different sequences of intermediate plateaux at the following
fractional values of the saturation magnetization: 1/3-2/3-1, 0-1/3-2/3-1 or
0-2/3-1. The inverse susceptibility displays a marked temperature dependence
significantly influenced by a character of the zero-field ground state. The
obtained theoretical results are confronted with recent high-field
magnetization data of the mineral crystal fedotovite K2Cu3(SO4)3.

12
The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org