I'm not raging at ttsda. It is an advance. Of sorts. But not nearly as much as the headline suggests.
> The effort to manufacture synthetic diamond provided substantial motivation for the development of high-pressure methods. Today, however, synthetic diamonds are grown using a low-pressure technique called chemical-vapour deposition. Optimistically, it might eventually be possible to use similar low-pressure methods to produce metastable superconducting compounds that are initially discovered at high pressure.
In the scientific community, High-Tc superconductors typically refer to Type II superconductors, eg cuprates. And the “High-Tc” term means above temperatures relative to the usual elemental superconductor Tc’s, eg about 20K or so.
Materials that can superconduct above 77K are especially sought after since they can be cooled with only liquid nitrogen, much cheaper and abundant than liquid helium.
So, no, everybody cares about high temperature superconducors, because the higher the temperature, the strongest magnet you can build out of them.
Even if we could compress anything other than a spec of this stuff, it would still require massive amounts of PV work to achieve the P required.
Basically, low temperature superconductors (e.g. niobium titanium) are liquid helium cooled.
High temperature superconductors (e.g. YBCO, BSCCO) are everything else, but generally liquid nitrogen cooled.