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arXiv 0809.4932cond-mat.supr-con
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本征约瑟夫森结中纵向等离子体激发的实验观察

Experimental observation of the longitudinal plasma excitation in intrinsic Josephson junctions

A. Irie, Yu. M. Shukrinov, G. Oya

摘要:

研究了本征约瑟夫森结的电流-电压特性。最近,有人预言IJs中的参量共振可以激发等离子体纵波。这种激励在下腔静脉的折返区周围产生一个奇异点,称为断点区。我们在4.2K下成功地观察到了5个IJJ的台面IVC中的断点区。此外,发现断点电流的温度依赖性与理论预测一致。这表明激发的等离子体波的波数随温度而变化。

英文摘要:

We have investigated the current-voltage characteristics (IVCs) of intrinsic Josephson junctions (IJJs). Recently, it is predicted that the longitudinal plasma wave can be excited by the parametric resonance in IJJs. Such an excitation induces a singularity called as breakpoint region around switch back region in the IVC. We have succeeded in the observation of the breakpoint region in the IVC of the mesa with 5 IJJs at 4.2 K. Furthermore, it is found that the temperature dependence of the breakpoint current is in agreement with the theoretical prediction. This suggests that the wave number of the excited plasma wave varies with temperature.

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