5 ms·
Its interesting that graphene does have superconducting behavior, but its still does not occur until very low temperature[0]. This is a brand new discovery, so
by montecarl 8y ago
Its interesting that graphene does have superconducting behavior, but its still does not occur until very low temperature[0]. This is a brand new discovery, so it will be exciting to see how it advances. There are more degrees of freedom to be explored: doping, twist angle, multiple layers, etc.
[0] "The graphene sheets still required temperatures around 1.7 degrees above absolute zero, -456.6 F, to demonstrate superconductivity."
- azhenley 8y agoDoes anyone know how difficult/expensive it is to get something that cold? It seems like it would be virtually infeasible, but I really have no idea.
- acjohnson55 8y agoIt doesn't directly answer your question, but you might find this interesting: http://omegataupodcast.net/285-superconductivity/ http://omegataupodcast.net/285-superconductivity/
- hyeonwho4 8y agoIt's below the condensation temperature of helium, so they probably cool it by evaporating liquid helium. Sample volume, existing kit, helium recycling loops are going to vastly change the price structure of that experiment.
- Iv 8y agoIn terms of costs your thresholds are the boiling points of nitrogen (77K, surprisingly cheap and easy to deal with, even for a hobbyist) and helium (33K, more expensive,scarce, requires more energy to condense). To get lower than that, you need your own cryogenic cascade as I doubt you can easily buy something as ridiculously dangerous as liquid hydrogen (boiling point of 4K, explosive in contact with oxygen). At less than 2K I think that the only merits of this discovery are theoretical. I don't think that anyone believes that superconductors below nitrogen temperature have any viability outside the lab.
- Dylan16807 8y agoYou mixed up the temperatures for hydrogen and helium.
- Iv 8y agoThanks!
- lgats 8y agoliquid hydrogen safety https://www.youtube.com/watch?v=7bFJK5kU_UQ https://www.youtube.com/watch?v=7bFJK5kU_UQ [it doesn't explode on contact with air]
- mjevans 8y agoI find the newly observed properties to be interesting and hope that they lead to a deeper understanding of superconductivity in general.