A first-principles comparison of IPA, RPA, TD-ALDA, and BSE for the frequency-dependent spin magnetoelectric tensor of Cr2O3 finds BSE reproduces excitonic resonances and TDDFT reproduces the magnonic static limit.
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The Frequency-Dependent Spin Contribution to the Magnetoelectric Tensor of Cr$_2$O$_3$: A First-Principles Study
A first-principles comparison of IPA, RPA, TD-ALDA, and BSE for the frequency-dependent spin magnetoelectric tensor of Cr2O3 finds BSE reproduces excitonic resonances and TDDFT reproduces the magnonic static limit.