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Magnetic field dependence of the coupling efficiency of a superconducting transmission line due to the proximity effect
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10.1063/1.3276076
/content/aip/journal/apl/95/25/10.1063/1.3276076
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/25/10.1063/1.3276076

Figures

Image of FIG. 1.
FIG. 1.

Upper: schematic cross-section of the TL and SIS junction. The rf radiation is collected by a horn with a waveguide (not shown here) and picked up at the probe point. The Nb/Al groundplane forms the proximity coupled bilayer. The Nb topwire on amorphous layer has nonuniform properties (see Ref. 8 ) turning it effectively into a bilayer. Lower: equivalent circuit of the TL with the junction, as well as the antenna and waveguide.

Image of FIG. 2.
FIG. 2.

Typically measured and calculated (lines) dc curves of the junction at 4.2 K. A Dynes broadening parameter (Ref. 16 ) of is used for the top Nb electrode. The Josephson current is not included in the fitting. Inset: theoretical predictions of FTS response when only considering the influence of Nb/Al ground plane.

Image of FIG. 3.
FIG. 3.

Measured and calculated (lines) FTS responses of the TL at 4.2 K, both of which are normalized to the maximum value of the curve at and , respectively. The atmospheric absorption has been removed from the measured data. The inset shows the full FTS response at .

Image of FIG. 4.
FIG. 4.

(a) DOS at the surfaces and interfaces of the Nb/Al bilayer. is the calculated gap energy of bulk Nb. (b) Complex conductivities at the surface of Al layer .

Tables

Generic image for table
Table I.

Parameters of Al and Nb films. Nb films are deposited on the amorphous layer. and are interrelated by the intrinsic value of .

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/content/aip/journal/apl/95/25/10.1063/1.3276076
2009-12-22
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic field dependence of the coupling efficiency of a superconducting transmission line due to the proximity effect
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/25/10.1063/1.3276076
10.1063/1.3276076
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