1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Sub-micron normal-metal/insulator/superconductor tunnel junction thermometer and cooler using Nb
Rent:
Rent this article for
USD
10.1063/1.4751355
/content/aip/journal/apl/101/11/10.1063/1.4751355
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/11/10.1063/1.4751355
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) SEM of a sample showing the measurement configuration. The outermost two larger electrodes serve as the cooler junctions, while a pair of inner electrodes acts as a NIS thermometer to sense the electron temperature of the Cu wire. (b) High resolution SEM of a single junction showing the tapered Nb edge (blue) covered with Al (green), contacting the Cu (red). (c) Measured dI/dV − V characteristics of a NIS junction pair, indicated by the red dots, at a bath temperature of 150 mK, for samples with three different thicknesses of the Al layer (7, 10, 20 nm). Theoretical fits using a parallel junction model are represented by the lines, with parameters shown in the figure. The measured total tunneling resistances for each NIS pair were 60, 22, and , for the 7, 10, and 20 nm thick Al layers, respectively.

Image of FIG. 2.
FIG. 2.

Bath temperature dependence of (a) I − V and (b) dI/dV − V characteristics of a NIS pair with 7 nm thick aluminium, between 0.15 and 1.2 K. The dots are the experimental data while the lines are theoretical fits for , 1.2 K, and 6 K (normal state), with electron temperature constant and equal to . The dotted line in (a) represents a constant current bias of 3.5 nA.

Image of FIG. 3.
FIG. 3.

Thermometry characteristics for the sample with (a) 7 nm Al, bias current , and (b) 10 nm Al, bias current 20 nA. The solid lines indicate the corresponding theoretical fits. (c) Measured electron temperature of the copper wire as a function of cooler voltage at several bath temperatures, for the sample with 7 nm Al.

Loading

Article metrics loading...

/content/aip/journal/apl/101/11/10.1063/1.4751355
2012-09-10
2014-04-17
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Sub-micron normal-metal/insulator/superconductor tunnel junction thermometer and cooler using Nb
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/11/10.1063/1.4751355
10.1063/1.4751355
SEARCH_EXPAND_ITEM