Searching for Josephson Junctions

[forex10]

Hello,
I am searching for off the shelf Josephson Junctions for experimental purposes. All I have found is a specialized semiconductor design/fabrication business. I am not a huge expert on physics or electronics, but I would think they would be more available than what I have found. Also, I am not looking for squids. I hope some one can help me out.

Joe L.

 

[f95toli]

Do you have access to liquid helium, or a 2-stage cryocooler?

There are a few companies that could probably sell you chips with Josephson junctions, but they all (maybe with one exception) use Nb technology, i.e. you need to cool the junction down to around 4K.

 

[forex10]

No I do not have access to any cryogenic equipment. The reason I wanted to find ceramic superconductors was to try to avoid that, but from what I am learning ceramic alloys SC's could still be enhanced with some extra cooling. Thanks for your reply.

 

[f95toli]

Even with ceramic superconductors you still need cryogenic equipment, YBCO has a Tc of 92K; but you really need to be down at 77K (liquid nitrogen), and ideally colder, in order to operate Josephson junctions.

 

[alphy]

Hello Joe,

Thank you for reaching out and sharing your search for Josephson Junctions. I can understand your frustration in not being able to find them readily available for your experimental purposes. Josephson Junctions are specialized devices that are typically used in research and high-tech industries, so it is not surprising that they may not be easily found in mainstream markets.

One possibility is to reach out to universities or research institutions that specialize in superconductivity and quantum electronics. They may have the resources and expertise to provide or point you in the direction of where to find Josephson Junctions.

Additionally, you could also consider contacting the specialized semiconductor design and fabrication businesses you have come across. They may be able to provide customized Josephson Junctions or have connections to other suppliers.

I wish you the best of luck in your search and hope you are able to find the Josephson Junctions you need for your experiments.

Best,