Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nontrivial ferrimagnetism of the Heisenberg model on the Union Jack
  strip lattice   We study the ground-state properties of the S=1/2 antiferromagnetic
Heisenberg model on the Union Jack strip lattice by using the
exact-diagonalization and density matrix renormalization group methods. We
confirm a region of the intermediate-magnetization state between the Neel-like
spin liquid state and the conventional ferrimagnetic state of Lieb-Mattis type.
In the intermediate-state, we find that the spontaneous magnetization changes
gradually with respect to the strength of the inner interaction. In addition,
the local magnetization clearly shows an incommensurate modulation with
long-distance periodicity in the intermediate-magnetization state. These
characteristic behaviors lead to the conclusion that the
intermediate-magnetization state is the non-Lieb-Mattis ferrimagnetic one. We
also discuss the relationship between the ground-state properties of the S=1/2
antiferromagnetic Heisenberg model on the original Union Jack lattice and those
on our strip lattice.

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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ex