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February 8th, 2010
...hope is restored thanks to a fascinating set of calculations carried out by Gianluca Savini at the University of Cambridge in the UK and a couple of buddies. They calculate the properties of p-doped graphane from first principles and say that it ought to superconduct at a balmy 90K or more, well within the range of liquid nitrogen cooling.
What's more p-doped graphane should superconduct in the same way as the old fashioned BCS superconductors. That's curious because everybody believes that BCS superconductivity cannot work at high temperatures.
...by creating transistor-like gates out of graphane doped in different ways, it should be possible to create devices in which the superconductivity can be switched on and off. That'll make possible an entirely new class of switch.
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