5 ms·

Twistronics: superconductor prototypes discovered after twisting graphene sheets

72 points by solarengineer 7y ago

solarengineer 7y ago
From the article: Recently, physicists from the Massachusetts Institute of Technology discovered that stacking two sheets of graphene and twisting a small angle between them reveals an entire new field of material science – twistronics. In a paper published in Nature, researchers have taken a look into this new material, known as the magic-angle twisted bilayer graphene. By modifying the graphene’s temperature, they were able to cause the material to shift from behaving like an insulator to transforming into a superconductor.
dang 7y ago
Url changed from https://hackaday.com/2019/12/27/magic-angle-twisted-bilayer-graphene-yes-thats-the-scientific-name/ https://hackaday.com/2019/12/27/magic-angle-twisted-bilayer-..., which points to this.
- kevingadd 7y ago
  Does it really make sense to change the URL from a non-paywalled site to a paywalled one? The NYT version doesn't even load a hyperlink that I can use to read the Nature paper, while the hackaday site loads and I can follow links through to the paper and to NYT.
  - dang 7y ago
    If there's a paywall workaround, it's ok. Users usually post workarounds in the threads. There's one in this thread. No question the paywalls suck, but until there's an industry-level solution, this is the best of the bad options we're stuck with. There's more explanation here: https://hn.algolia.com/?sort=byDate&dateRange=all&type=comment&storyText=false&prefix&page=0&query=by:dang%20paywall https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme... https://news.ycombinator.com/item?id=10178989 https://news.ycombinator.com/item?id=10178989
neonate 7y ago
http://archive.md/hU8Zg http://archive.md/hU8Zg
jchook 7y ago
Is this the same phenomenon discovered last year by Yuan Cao et al? https://www.nature.com/articles/nature26154 https://www.nature.com/articles/nature26154
- david-gpu 7y ago
  From TFA: “What M.I.T. saw, we reproduce,” he said. “But on top of that we observe many more states, which most likely in his case were not seen, because of the dirty devices.”
LatteLazy 7y ago
If anyone ever managed to produce and manipulate graphine in a controlled way and at industrial scale it will revelationise whole economic sectors. U til then though...
- jchook 7y ago
  Saw this article recently about a Cambridge spin-out making 8" wafers of graphene: https://www.cam.ac.uk/research/news/cambridge-spin-out-starts-producing-graphene-at-commercial-scale https://www.cam.ac.uk/research/news/cambridge-spin-out-start...
beagle3 7y ago
Don't remember where I saw that saying, but ... "Graphene. There's nothing it can't do, except leave the lab"

72 points by solarengineer 7y ago

From the article: Recently, physicists from the Massachusetts Institute of Technology discovered that stacking two sheets of graphene and twisting a small angle between them reveals an entire new field of material science – twistronics. In a paper published in Nature, researchers have taken a look into this new material, known as the magic-angle twisted bilayer graphene. By modifying the graphene’s temperature, they were able to cause the material to shift from behaving like an insulator to transforming into a superconductor.

dang 7y ago

Url changed from https://hackaday.com/2019/12/27/magic-angle-twisted-bilayer-graphene-yes-thats-the-scientific-name/ https://hackaday.com/2019/12/27/magic-angle-twisted-bilayer-..., which points to this.

kevingadd 7y ago
Does it really make sense to change the URL from a non-paywalled site to a paywalled one? The NYT version doesn't even load a hyperlink that I can use to read the Nature paper, while the hackaday site loads and I can follow links through to the paper and to NYT.
- dang 7y ago
  If there's a paywall workaround, it's ok. Users usually post workarounds in the threads. There's one in this thread. No question the paywalls suck, but until there's an industry-level solution, this is the best of the bad options we're stuck with. There's more explanation here: https://hn.algolia.com/?sort=byDate&dateRange=all&type=comment&storyText=false&prefix&page=0&query=by:dang%20paywall https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme... https://news.ycombinator.com/item?id=10178989 https://news.ycombinator.com/item?id=10178989

neonate 7y ago

http://archive.md/hU8Zg http://archive.md/hU8Zg

jchook 7y ago

Is this the same phenomenon discovered last year by Yuan Cao et al? https://www.nature.com/articles/nature26154 https://www.nature.com/articles/nature26154

david-gpu 7y ago
From TFA: “What M.I.T. saw, we reproduce,” he said. “But on top of that we observe many more states, which most likely in his case were not seen, because of the dirty devices.”

LatteLazy 7y ago

If anyone ever managed to produce and manipulate graphine in a controlled way and at industrial scale it will revelationise whole economic sectors. U til then though...

jchook 7y ago
Saw this article recently about a Cambridge spin-out making 8" wafers of graphene: https://www.cam.ac.uk/research/news/cambridge-spin-out-starts-producing-graphene-at-commercial-scale https://www.cam.ac.uk/research/news/cambridge-spin-out-start...

beagle3 7y ago

Don't remember where I saw that saying, but ... "Graphene. There's nothing it can't do, except leave the lab"