Superconductive junction

Details Superconductive junction Superconductive junction

H - Electricity

01

L

H01L 39/22 (2006.01)

Patent

CA 2186359

A superconductive junction (10) comprises a first track (22) of YBa2Cu3O7 surmounted by a second track (28) also of YBa2Cu3O7. An interconnect (26) in the form of a superconductive mesa electrically connects the first track to the second track and acts as a microbridge. When cooled below a critical temperature, the junction (10) shows Josephson-like behaviour. A non- superconductive layer (24) of PrBa2Cu3O7 separates the first track and the second track, with the interconnect extending through the PrBa2Cu3O7 layer in the form of an island. The junction (10) is fabricated by electron beam evaporation, optical lithography, and ion beam milling.

Une jonction supraconductrice (10) comprend une première piste (22) de YBa¿2?Cu¿3?O¿7? surmontée par une deuxième piste (28) de ce matériau. Une interconnexion (26) en forme de mésa supraconductrice connecte ces deux pistes sur le plan électrique et agit en tant que micropont. Lorsqu'elle est refroidie au-dessous d'une température critique, cette jonction (10) présente un comportement semblable à celui de Josephson. Une couche non supraconductrice (24) de P¿2?Ba¿2?Cu¿3?O¿7? sépare ces deux pistes et l'interconnexion traverse cette couche en prenant la forme d'un îlot. On fabrique cette jonction (10) par évaporation par faisceau d'électrons, gravure optique et usinage ionique.

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