Room temperature superconductivity at 1 atm

[tmazanec1]

https://arxiv.org/pdf/1801.09376.pdf
Meissner effect confirmed. Current flowed for 50 days.

[Rynn]

I wouldn't say this is confirmed, reported yes but it appears that paper has not been accepted anywhere as of yet for peer review, at least not that I could find in the last ten minutes. What I did manage to find is that this Professor has been claiming similar things since at least 2013:

https://www.chemistryworld.com/news/new-...76.article

Meanwhile, Yasushi Kawashima of Tokai University in Japan claims to have produced room-temperature superconductivity by soaking HOPG in n-heptane or n-octane, packing the flakes into a small hollow ring made from PTFE and inducing a current within the graphite.4 Kawashima says that the current did not decay for 50 days and that measurements showed that ‘the resistance of these samples decreases to less than the smallest resistance that can be measured with a high resolution digital voltmeter’. He concludes that the results ‘suggest that a room temperature superconductor may be obtained by bringing alkanes into contact with a graphite surface’.

Obviously it would be great if true (aside from the fact that graphene can do anything but leave the lab) but it doesn't seem to have any independent verification as of yet.

[tmazanec1]

Sorry, I thought that since it was arxiv and not viXra that it would be plausible.
Also, there is a fringe researcher who claims superconductivity at 489 K, similar to the earlier paper's 504 K, which I find interesting (not conclusive, of course)
http://www.superconductors.org/216C209C.htm
This would not be room temperature superconductivity, it would be oven temperature superconductivity!
How high a Temperature can we manage in 10,601 AT?

[tmazanec1]

Here is another possible RTSC:
https://arxiv.org/pdf/1807.08572.pdf

[Rynn]

Could you post the original publication please (I.e the journal reference) rather than arXiv? Thanks.

[tmazanec1]

Could you post the original publication please (I.e the journal reference) rather than arXiv? Thanks.

I'm not sure what you mean...how would I get that?
This is the ref on Next Big Future.

[sandcastles]

Is it likely for any materials to have superconducting at several different ranges of temperatures?

For example, it's only superconducting between 100 and 110 K, 130 and 140 K, 170 and 181 K, 189 and 191 K, etc. Outside those ranges it's not superconducting. Is that plausible?

[dsmike1980]

Is it likely for any materials to have superconducting at several different ranges of temperatures?

For example, it's only superconducting between 100 and 110 K, 130 and 140 K, 170 and 181 K, 189 and 191 K, etc.  Outside those ranges it's not superconducting.  Is that plausible?

Also for whoever answers the above question, what is the highest temperature at which superconductivity is possible? There is much talk of room temperature superconductors, but what about hotter?