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arXiv 1010.3687cond-mat.str-el
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多轨道莫特绝缘体的电极化的强度理论

Theory of electric polarization in multi-orbital Mott insulators

Maxim Mostovoy, Kentaro Nomura, Naoto Nagaosa

摘要:

从理论上研究了多轨道莫特绝缘体中电场E与自旋的相互作用。我们发现一个通用的动力学耦合机制,适用于所有的晶格,不涉及相对论效应。耦合的一般形式为-T_ab E_a e_b,其中e是电子动力学Berry相产生的"内部"电场,T_ab是由晶格对称性决定的张量。我们讨论了这种相互作用的几个影响:(一)一个不寻常的电子自旋共振引起的振荡电场,(二)在外加电场中的自旋纹理的位移,和(三)圆偏振光的Skyrmions,磁泡,磁涡旋的共振吸收。

英文摘要:

The interaction between the electric field, E, and spins in multi-orbital Mott insulators is studied theoretically. We find a generic dynamical coupling mechanism, which works for all crystal lattices and which does not involve relativistic effects. The general form of the coupling is -T_ab E_a e_b, where e is the `internal' electric field originating from the dynamical Berry phase of electrons and T_ab is a tensor determined by lattice symmetry. We discuss several effects of this interaction: (i) an unusual electron spin resonance induced by an oscillating electric field, (ii) the displacement of spin textures in an applied electric field, and (iii) the resonant absorption of circularly polarized light by Skyrmions, magnetic bubbles, and magnetic vortices.

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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