Electron heating by photon-assisted tunneling in niobium terahertz mixers with integrated niobium titanium nitride striplines

Leone, B.; Gao, J. R.; Klapwijk, T. M.; Jackson, B. D.; Laauwen, W. M.; de Lange, G.
March 2001
Applied Physics Letters;3/12/2001, Vol. 78 Issue 11, p1616
Academic Journal
We describe the gap voltage depression and current-voltage (I-V) characteristics in pumped niobium superconductor-insulator-superconductor junction with niobium titanium nitride tuning stripline by introducing an electron heating power contribution resulting from the photon-assisted tunneling process. Theoretical fits using the extended Tien-Gordon theory are obtained that reproduce the most salient features of the pumped I-V characteristics. © 2001 American Institute of Physics.


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