Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ground State of the Double Exchange Model   We invesitgate the electronic correlation effect on the ground-state
properties of the double exchange model for manganites by using a semiclassical
approach and the slave-boson technique. It is shown that magnetic feild has a
similar effect on the canted angle between manganese spins as doping
concentration does, and the canted angle exhibits weak dependence on the
Coulomb interaction. We have shown that the phase separation may take place at
low doping. In the slave-boson saddle-point approximation in the ferromagnetic
metallic regime, the dependence of the magnetization and the Curie temperature
on the doping concentration exhibits maxima near 1/3 doping. These results
agree with experimental data and suggest that the electronic correlation plays
an important role for understanding the ground-state properties of manganites.

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The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
31
The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
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The categories of this paper are: math-ph