Electrodynamic response and local tunneling spectroscopy of strongly disordered superconducting TiN films

被引：48
作者：
Coumou, P. C. J. J. [1 ]
Driessen, E. F. C. [2 ,3 ]
Bueno, J. [4 ]
Chapelier, C. [2 ,3 ]
Klapwijk, T. M. [1 ,5 ]
机构：
[1] Delft Univ Technol, Kavli Inst Nanosci, Delft, Netherlands
[2] CEA INAC, SPSMS LaTEQS, UMR E 9001, Grenoble, France
[3] Univ Grenoble 1, Grenoble, France
[4] SRON Netherlands Inst Space Res, Utrecht, Netherlands
[5] Moscow State Pedag Univ, Dept Phys, Moscow 119991, Russia
来源：
PHYSICAL REVIEW B | 2013年 / 88卷 / 18期
关键词：
TRANSITION;
D O I：
10.1103/PhysRevB.88.180505
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the electrodynamic response of strongly disordered superconducting TiN films using microwave resonators, where the disordered superconductor is the resonating element in a high-quality superconducting environment of NbTiN. We describe the response assuming an effective pair-breaking mechanism modifying the density of states and compare this to local tunneling spectra obtained using scanning tunneling spectroscopy. For the least disordered film (k(Fl) = 8.7, R-s = 13 Omega), we find good agreement, whereas for the most disordered film (k(F)l = 0.82, R-s = 4.3 k Omega), there is a strong discrepancy, which signals the breakdown of a model based on uniform properties.
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页数：5
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