Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic Couplings in Edge-Sharing $d^7$ Compounds   High-spin $d^7$ Co(II) compounds have recently been identified as possible
platforms for realising highly anisotropic and bond-dependent couplings
featured in quantum-compass models such as the celebrated Kitaev model. In
order to evaluate this potential, we consider all symmetry-allowed
contributions to the magnetic exchange for ideal edge-sharing bonds. Though a
combination of ab-initio and cluster many-body calculations we conclude that
bond-dependent couplings are generally suppressed in favor of Heisenberg
exchange for realistic materials. Consequences for several prominent materials
including Na$_2$Co$_2$TeO$_6$ and BaCo$_2$(AsO$_4$)$_2$ are discussed.

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The categories of this paper are: hep-th
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The categories of this paper are: math
21
The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
1
The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph