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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Abstract

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.

Original language	English
Pages (from-to)	418-420
Number of pages	3
Journal	Applied Physics Letters
Volume	69
Issue number	3
DOIs	https://doi.org/10.1063/1.118080
Publication status	Published - 15-Jul-1996

Keywords

JUNCTIONS
FILMS

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

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Cite this

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abstract = "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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AU - Dieleman, P.

AU - Klapwijk, T.M.

AU - Kovtonyuk, S.

AU - van de Stadt, H.

N1 - Journal JUL 15 UW820 APPL PHYS LETT

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Y1 - 1996/7/15

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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