arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1204.2771cond-mat.str-elcond-mat.mtrl-sci
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局域非中心对称的磁电效应

Magnetoelectric effect due to local noncentrosymmetry

V. P. Sakhnenko, N. V. Ter-Oganessian

摘要:

磁电体通常具有位于非中心对称环境中的离子。基于这一事实,我们提出了一个微观模型的磁电相互作用,并表明自旋轨道耦合导致自旋相关的电偶极矩的电子轨道的这些离子,这导致在非零极化某些自旋配置。该方法占宏观对称性的单位细胞,是有效的公度和复杂的无公度磁结构。以MnWO_4、MnPS_3和LiNiPO_4为例说明了该模型。讨论了它在其它磁电材料中的应用。

英文摘要:

Magnetoelectrics often possess ions located in noncentrosymmetric surroundings. Based on this fact we suggest a microscopic model of magnetoelectric interaction and show that the spin-orbit coupling leads to spin-dependent electric dipole moments of the electron orbitals of these ions, which results in non-vanishing polarization for certain spin configurations. The approach accounts for the macroscopic symmetry of the unit cell and is valid both for commensurate and complex incommensurate magnetic structures. The model is illustrated by the examples of MnWO4, MnPS3 and LiNiPO4. Application to other magnetoelectrics is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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