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arXiv 1410.4402cond-mat.supr-con
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测量高- $T_{c}$氧化物之间的稳态约瑟夫森电流作为检测电荷密度波的工具

Measurements of Stationary Josephson Current between High-$T_{c}$ Oxides as a Tool to Detect Charge Density Waves

Alexander M. Gabovich, Mai Suan Li, Henryk Szymczak, Alexander I. Voitenko

摘要:

在适用于高$T_{c}$铜氧化物的二维模型中,分析了具有$d$ -波序参量对称性和电荷密度波(CDW)部分能隙的超导体之间的稳态约瑟夫森隧道电流$I_{c}$.结果表明,在一定的实验条件下,由于超导能隙和CDW能隙在动量空间的特殊重叠,$I_{c}$对CDW参数的依赖关系可能是强非单调的.因此,我们建议,$I_{c}$测量在很宽的范围内的掺杂可以作为一个指标的CDW存在的pseudogap区域的铜酸盐相图。此外,还分析了取向$I_{c}$的依赖性。

英文摘要:

Stationary Josephson tunnel current $I_{c}$ between superconductors with $d$-wave order parameter symmetry and charge-density-wave (CDW) partial gapping was analyzed in the two-dimensional model appropriate to high-$T_{c}$ cuprates. It was shown that, in certain experimental setups, due to the peculiar overlap of superconducting and CDW gaps in the momentum space, the dependence of $I_{c}$ on the CDW parameters may be strongly nonmonotonic. Hence, we suggested that $I_{c}$ measurements in the wide range of dopings can serve as an indicator of CDW existence in the pseudogap regions of the cuprate phase diagrams. Besides, the orientation $I_{c}$-dependences were analyzed.

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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