arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.6072cond-mat.supr-concond-mat.mes-hall
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常规和高温超导体集体超流激发的红外纳米光谱和成像

Infrared nano-spectroscopy and imaging of collective superfluid excitations in conventional and high-temperature superconductors

H. T. Stinson, J. S. Wu, B. Y. Jiang, Z. Fei, A. S. Rodin, B. C. Chapler, A. S. Mcleod, A. Castro Neto, Y. S. Lee, M. M. Fogler, D. N. Basov

摘要:

我们研究了传统和非传统超导体的近场红外光谱和超流极化激元成像实验。我们的模型表明,近场光谱可以测量的大小的超导能隙在Bardeen-Cooper-Schriffler类超导体的纳米空间分辨率。我们演示了同样的技术可以测量c轴等离子体频率,从而c轴超流密度,分层的非常规超导体具有类似的空间分辨率。我们的模拟还表明,近场技术可以成像超流表面模式的物理和电子边界附近的干涉图案。我们描述了如何使用这些图像来提取各向异性超导体的集体模式色散与亚衍射空间分辨率。

英文摘要:

We investigate near-field infrared spectroscopy and superfluid polariton imaging experiments on conventional and unconventional superconductors. Our modeling shows that near-field spectroscopy can measure the magnitude of the superconducting energy gap in Bardeen-Cooper-Schrieffer-like superconductors with nanoscale spatial resolution. We demonstrate how the same technique can measure the c-axis plasma frequency, and thus the c-axis superfluid density, of layered unconventional superconductors with a similar spatial resolution. Our modeling also shows that near-field techniques can image superfluid surface mode interference patterns near physical and electronic boundaries. We describe how these images can be used to extract the collective mode dispersion of anisotropic superconductors with sub-diffractional spatial resolution.

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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