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After on-die memory controllers, PCIe bus, ...

The idea has been around for a few years and is already used in hot-electron and cold-electron bolometers. Basically the NIS junction works as an Andreev mirror and cools the electron gas. There is no direct phonon cooling.

The main problem is that you still need to to cool the sample down to below the cricital temperature of the superconductor before it will start to work. In this case they use aluminium meaning that you need to cool the whole thing below about 1.5K ( about -272 degrees C).
In the experiment they cooled the sample from 0.320 to 0.225 K.

The effect is neat and potenitally interesting in some applications but you won't be able to use it to cool a CPU.

 
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