Direct current heating in superconductor-insulator-superconductor tunnel devices for THz mixing applications

P. Dieleman; T.M. Klapwijk; S. Kovtonyuk; H. van de Stadt

doi:10.1063/1.118080

Direct current heating in superconductor-insulator-superconductor tunnel devices for THz mixing applications

P. Dieleman, T.M. Klapwijk, S. Kovtonyuk, H. van de Stadt

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DC heating effects in superconductor-insulator-superconductor (SIS) tunnel junctions are studied by comparing junctions sandwiched between niobium or aluminum layers. With niobium a temperature rise of several Kelvin is observed, which is reduced by an order of magnitude by using aluminum. A simple model satisfactorily explains this observation and predicts a 30% increase in the subgap current due to the elevated temperature. At the operating voltage for heterodyne mixing the receiver noise temperature increases by only 2%. (C) 1996 American Institute of Physics.

Originele taal-2	English
Pagina's (van-tot)	418-420
Aantal pagina's	3
Tijdschrift	Applied Physics Letters
Volume	69
Nummer van het tijdschrift	3
DOI's	https://doi.org/10.1063/1.118080
Status	Published - 15-jul.-1996

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10.1063/1.118080

Direct current heating in superconductor–insulator–superconductor tunnel devicesFinal publisher's version, 228 KBLicentie: Unspecified

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AU - van de Stadt, H.

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N2 - DC heating effects in superconductor-insulator-superconductor (SIS) tunnel junctions are studied by comparing junctions sandwiched between niobium or aluminum layers. With niobium a temperature rise of several Kelvin is observed, which is reduced by an order of magnitude by using aluminum. A simple model satisfactorily explains this observation and predicts a 30% increase in the subgap current due to the elevated temperature. At the operating voltage for heterodyne mixing the receiver noise temperature increases by only 2%. (C) 1996 American Institute of Physics.

AB - DC heating effects in superconductor-insulator-superconductor (SIS) tunnel junctions are studied by comparing junctions sandwiched between niobium or aluminum layers. With niobium a temperature rise of several Kelvin is observed, which is reduced by an order of magnitude by using aluminum. A simple model satisfactorily explains this observation and predicts a 30% increase in the subgap current due to the elevated temperature. At the operating voltage for heterodyne mixing the receiver noise temperature increases by only 2%. (C) 1996 American Institute of Physics.

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