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arXiv 0902.0495cond-mat.str-el
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螺旋磁体光学响应中的电磁振子共振

Electromagnon Resonances in the Optical Response of Spiral Magnets

A. Cano

摘要:

研究了螺旋磁体的光学响应,特别是其电磁子特性。我们表明,这些功能追溯到共振磁电响应所产生的螺旋排序(无论任何伴随的铁电性)。这种响应本质上是磁电的,并不总是可以被简化为有效的电容率。我们认为,螺旋磁体中的电磁振子可以产生,除了观察到的多铁性材料的光吸收峰,(动态增强)旋光和负折射率行为。

英文摘要:

The optical response of spiral magnets is studied, with special attention to its electromagnon features. We show that these features trace back to the resonant magnetoelectric response resulting from the spiral ordering (irrespective of any concomitant ferroelectricity). This response, being magnetoelectric in nature, not always can be reduced to an effective electric permittivity. We argue that electromagnons in spiral magnets can produce, in addition to the observed peaks in the optical absorption of multiferroics, a (dynamically enhanced) optical rotation and a negative refractive index behavior.

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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