5 ms·
New way to read data in antiferromagnets unlocks their use as computer memory
- vxNsr 3y agoThis feels like one of those things you'll read about every 10 years for your entire life and will always be just 3-5 years away
- hinkley 3y agoI think I left my memristors in my flying car.
- deleted 3y ago[deleted]
- 77pt77 3y agoDoes your car run on nuclear fusion power?
- readyplayernull 3y agoJust grab a jetpack a go for it!
- mschuster91 3y agoAt least jetpacks are a viable thing now [1][2]... although it shudders to read that these beasts have almost 800 kW of power. The heat from these must be insane. [1] https://en.wikipedia.org/wiki/Daedalus_Flight_Pack https://en.wikipedia.org/wiki/Daedalus_Flight_Pack [2] https://en.wikipedia.org/wiki/Flyboard_Air https://en.wikipedia.org/wiki/Flyboard_Air
- ck2 3y agohttps://m.xkcd.com/678/ https://m.xkcd.com/678/
- DannyBee 3y agoIf you just keep your server room at 5 kelvin, you can continuously take advantage of all the latest science has to offer.
- imtringued 3y ago3D Xpoint was shut down by Intel even though the product was promising. The problem in the volatile and nonvolatile memory market is that a new type of memory will not reach the economies of scale necessary unless it can completely replace the exiting technology. HBM is still a niche technology. Processing in memory? Cool but upmem hasn't updated their hardware in a while, indicating that the demand isn't there.
- de_nied 3y ago"The discovery suggests that wireless energy, like that from Wi-Fi and mobile signals, could cause antiferromagnets to produce electricity that might one day be tapped to power portable electronic devices." I think this is even a more interesting application.
- mcpackieh 3y agoRectennas can do this, it's the basis of passive RFID, but under normal circumstances there's very little power available to harvest.
- inhumantsar 3y ago> unlocks their use as computer memory The big asterisk on that being "at 5 Kelvin".
- alenrozac 3y agoThey do say next research step is room temperature..
- hinkley 3y agoSure it is. (Memory doesn’t run at room temperature. It runs at half the boiling point of water).
- hoerensagen 3y agoMemory runs at -68.5°C ?
- hinkley 3y agoYou have water at -68.5 C? Most of us call that ice. So I am pretty sure you know what I mean and you’re flirting with the HN rules.
- liminvorous 3y agoYou can't halve the temperature of something by halving its measument in Celcius, because the celcius starts at some arbitary point above absolute zero. 50 degrees celcius is 86% as hot as the boiling point of water, not 50%.
- gavinray 3y agoCan any physicist explain the term "quantum metric"? Googling it appears to give no relevant results. Might it be a typo? > "The researchers said that the unique voltage arises from the electronic properties of the manganese bismuth telluride crystals, called the quantum metric."
- physicsguy 3y agoSometimes there are properties in quantum systems that are measurable not because of the state itself, but because of the history of the system, for e.g. the topology that an electron travels through. A good example of this is the quantum Hall effect, where you get discrete jumps in the conductance across 2D systems in which a voltage is applied in a transverse direction. This is caused by Berry Curvature, which is the real part of a geometric tensor that describes the topology of the quantum state. The imaginary part of the same tensor is called the “quantum metric”. In this specific case, they’re measuring a different voltage due to electrons passing through the data written in the antiferromagnet. They pose theoretically in the paper that it could be because of an effect of the quantum metric
- gavinray 3y agoThank you!