Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Noncollinear Magnetism in Density Functional Calculations   We generalize the treatment of the electronic spin degrees of freedom in
density functional calculations to the case where the spin vector variables
employed in the definition of the energy functional can vary in any direction
in space. The expression for the generalized exchange-correlation potential
matrix elements is derived for general functionals which among their
ingredients include the electron density, its gradient and Laplacian, the
kinetic energy density, and non-local Hartree-Fock type exchange. We present
calculations on planar Cr clusters that exhibit ground states with noncollinear
spin densities due to geometrically frustrated antiferromagnetic interactions.

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The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
2
The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th