Local thermometry technique based on proximity-coupled superconductor/normal-metal/superconductor devices

Jiang, Z.; Lim, H.; Chandrasekhar, V.; Eom, J.
September 2003
Applied Physics Letters;9/15/2003, Vol. 83 Issue 11, p2190
Academic Journal
In mesoscopic superconductor/normal-metal/superconductor heterostructures, it is known that the resistance of the normal metal between the superconductors has a strong temperature dependence. Based on this phenomenon, we have developed a type of thermometer, which dramatically enhances our ability to measure the local electron temperature T[sub e] at low temperatures. Using this technique, we have been able to measure small temperature gradients across a micron-size sample, opening up the possibility of quantitatively measuring the thermal properties of mesoscopic devices. © 2003 American Institute of Physics.


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