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Width of the dip gives temperature

The main image is a micrograph of a SJT thermometer, where the actual thermometer junction (about 20 X 20 nm in size) is been circled. This particular thermometer is for higher temperature operation and therefore the the junction is very small.

The conductance dip (inset) has been taken at 42 K: the blue dots are experimental and the red line at the back is the corresponding theoretical line at the same temperature of 42 K.(Courtesy Jukka Pekola of the Helsinki University of Technology and Yu. A. Pashkin and J.S. Tsai of the NEC Nano Electronics Research Laboratories, Tsukuba, Japan.)