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Microscopic theory of temperature-dependent magnetoelectric effect in Cr2O3
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Microscopic theory of temperature-dependent magnetoelectric effect in Cr2O3
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We calculate the temperature-dependent magnetoelectric response of Cr2O3 from first principles. The form of the dominant magnetoelectric coupling is determined using symmetry arguments, its strength is found using ab initio methods, and the temperature dependence of the response is obtained from Monte Carlo simulations. The quantitative agreement of our results with experiment shows that the strong temperature dependence of the magnetoelectric effect in Cr2O3 results from non-relativistic exchange interactions and spin fluctuations.
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