First room-temperature superconductor reported

[Libertarian666]

Why not? It is 2020, after all!

https://arstechnica.com/science/2020/10 ... mperature/

[Cortopassi]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

[Libertarian666]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

It's a big help because it demonstrates that there is no theoretical bar to room temperature superconductivity. The rest is left as an exercise for a lot of engineers and scientists.

[Xan]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

It's a big help because it demonstrates that there is no theoretical bar to room temperature superconductivity. The rest is left as an exercise for a lot of engineers and scientists.

You could also say that there's no theoretical bar to atmospheric pressure superconductivity. But there sure as heck is a theoretical bar to superconductivity at atmospheric pressure and room temperature.

[Libertarian666]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

It's a big help because it demonstrates that there is no theoretical bar to room temperature superconductivity. The rest is left as an exercise for a lot of engineers and scientists.

You could also say that there's no theoretical bar to atmospheric pressure superconductivity. But there sure as heck is a theoretical bar to superconductivity at atmospheric pressure and room temperature.

Really? What is it?

[Xan]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

It's a big help because it demonstrates that there is no theoretical bar to room temperature superconductivity. The rest is left as an exercise for a lot of engineers and scientists.

You could also say that there's no theoretical bar to atmospheric pressure superconductivity. But there sure as heck is a theoretical bar to superconductivity at atmospheric pressure and room temperature.

Really? What is it?

You need either really low temperatures or really high pressure.

[Libertarian666]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

It's a big help because it demonstrates that there is no theoretical bar to room temperature superconductivity. The rest is left as an exercise for a lot of engineers and scientists.

You could also say that there's no theoretical bar to atmospheric pressure superconductivity. But there sure as heck is a theoretical bar to superconductivity at atmospheric pressure and room temperature.

Really? What is it?

You need either really low temperatures or really high pressure.

What is the theoretical reason for these requirements?

[Xan]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

It's a big help because it demonstrates that there is no theoretical bar to room temperature superconductivity. The rest is left as an exercise for a lot of engineers and scientists.

You could also say that there's no theoretical bar to atmospheric pressure superconductivity. But there sure as heck is a theoretical bar to superconductivity at atmospheric pressure and room temperature.

Really? What is it?

You need either really low temperatures or really high pressure.

What is the theoretical reason for these requirements?

I don't know. What was the theoretical reason for near-absolute-zero temperatures?

High pressure raises the freezing point of anything. If you have high enough pressure, you can have ice at higher temperatures. Exchanging temperature for pressure doesn't change the fundamentals.

[Cortopassi]

OMG this is feeling like a political fight.

[Cortopassi]

Exchanging temperature for pressure doesn't change the fundamentals.

That's how I saw it.

[yankees60]

OMG this is feeling like a political fight.

I'm on pins and needles waiting for someone to somehow tie it into either Trump / Biden or liberal / conservative!

Vinny

[Libertarian666]

"There are just two catches: we're not entirely sure what the chemical is, and it only works at 2.5 million atmospheres of pressure."

"At pressures of 175 GigaPascals, a transition to superconductivity took place once the sample was cooled to about 180 Kelvin, which corresponds to -93°C. But increasing the pressure caused this critical temperature to shift to higher temperatures. By 240 GigaPascals, the critical temperature had risen to just -28°C. By the maximum pressure tested, electrical resistance vanished at 288K—that's 15°C, or 60°F. In other words, these are temperatures you might easily find if you step out your front door, albeit at pressures only found deep inside Jupiter."

Darn. PV=nRT, so does it really make any difference that temp is room temp, but pressure is increased to make up for that?

Humans are amazing, but this doesn't seem to make these any closer to real world things yet.

It's a big help because it demonstrates that there is no theoretical bar to room temperature superconductivity. The rest is left as an exercise for a lot of engineers and scientists.

You could also say that there's no theoretical bar to atmospheric pressure superconductivity. But there sure as heck is a theoretical bar to superconductivity at atmospheric pressure and room temperature.

Really? What is it?

You need either really low temperatures or really high pressure.

What is the theoretical reason for these requirements?

I don't know. What was the theoretical reason for near-absolute-zero temperatures?

High pressure raises the freezing point of anything. If you have high enough pressure, you can have ice at higher temperatures. Exchanging temperature for pressure doesn't change the fundamentals.

There was never any fundamental theoretical reason for needing very low temperatures. One theory explained it in a way that relies on such low temperatures but that isn’t fundamental.