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Origin of ferroelectric polarization in spiral magnetic structure of MnWO_4

机译:MnWO_4螺旋磁性结构中铁电极化的起源

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摘要

Magnetism and the origin of ferroelectricity in the multiferroic MnWO_4 are studied using ab initio electronic-structure calculations, correctly reproducing the magnetic ground state. The calculated ferroelectric polarization is in good agreement with experiments. Our results reveal that spin-orbit interaction is necessary and sufficient to explain the observed ferroelectric polarization, establishing an entirely electronic origin of ferroelectricity in MnWO_4 The origin of spin-orbit interaction in this compound with a nominally d~5 L=0 orbitally quenched state is elucidated by analyzing results of x-ray absorption spectroscopy.
机译:使用从头算电子结构计算研究了多铁性MnWO_4中的磁性和铁电起源,正确地再现了磁性基态。计算出的铁电极化与实验吻合良好。我们的结果表明,自旋轨道相互作用对于解释所观察到的铁电极化是必要且充分的,从而在MnWO_4中建立了铁电的完全电子起源。标称d〜5 L = 0轨道淬灭态的该化合物的自旋轨道相互作用的起源通过分析X射线吸收光谱的结果来阐明。

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