Signatures of Unconventional Superconductivity in Granular Aluminum

被引：0
作者：
N. Bachar
U. S. Pracht
E. Farber
M. Dressel
G. Deutscher
M. Scheffler
机构：
[1] Ariel University,Laboratory for Superconductivity and Optical Spectroscopy
[2] Universität Stuttgart,Physikalisches Institut
[3] Tel Aviv University,Raymond and Beverly Sackler School of Physics and Astronomy
来源：
Journal of Low Temperature Physics | 2015年 / 179卷
关键词：
Unconventional superconductivity; Granular aluminum; THz spectroscopy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We present measurements of the complex transmission of superconducting granular aluminum thin films in the THz optical range. We discuss the dynamical conductivity and temperature-dependent energy gap of two films of different granular coupling. While the film of well-coupled grains follows the predictions for a conventional BCS superconductor, signatures of enhanced absorption are found at sub-gap frequencies when coupling is decreased. We discuss possible explanations which might account for the observed deviations from BCS theory.
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页码：83 / 89
页数：6
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