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arXiv 0811.2755cond-mat.supr-concond-mat.mes-hall
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磁场中第二类超导薄膜远红外单色光的反常透射

Anomalous far infrared monochromatic transmission through a film of type-II superconductor in magnetic field

Oleg L. Berman, Vladimir S. Boyko, Roman Ya. Kezerashvili, Yurii E. Lozovik

摘要:

发现并报道了通过II型超导薄膜中Abrikosov涡旋晶格的异常远红外单色传输。透射频率对应于由Abrokosov晶格的缺陷局域化的光子模式。这些缺陷是由放置在理想Abrokosov晶格的节点之外的额外涡旋形成的。额外的涡旋可以被超导体的晶格缺陷钉扎。相应的频率作为磁场和温度的函数的狄拉克型的两个带模型的框架内进行了研究。虽然我们的方法是有效的所有II型超导体,具体的计算已经进行了YBa $_{2}$ Cu $_{3}$ O $_{7-δ}$(YBCO)。分析了通过改变磁场和/或温度来控制发射频率。指出所发现的透射局域模可用于远红外单色滤光片。

英文摘要:

Anomalous far infrared monochromatic transmission through a lattice of Abrikosov vortices in a type-II superconducting film is found and reported. The transmitted frequency corresponds to the photonic mode localized by the defects of the Abrokosov lattice. These defects are formed by extra vortices placed out of the nodes of the ideal Abrokosov lattice. The extra vortices can be pinned by crystal lattice defects of a superconductor. The corresponding frequency is studied as a function of magnetic field and temperature in the framework of the Dirac-type two-band model. While our approach is valid for all type-II superconductors, the specific calculations have been performed for the YBa$_{2}$Cu$_{3}$O$_{7-δ}$ (YBCO). The control of the transmitted frequency by varying magnetic field and/or temperature is analyzed. It is suggested that found anomalously transmitted localized mode can be utilized in the far infrared monochromatic filters.

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