Ben Goldacre posted this on twitter and I was so intrigued, I had to dig a little deeper.

What’s happening here? A single crystal sapphire wafer is coated with a thin ceramic material called yttrium barium copper oxide. At room temperature, the ceramic layer has no interesting magnetic or electrical properties. However, when cooled below -185ºC (-301ºF) the material becomes a superconductor and conducts electricity with no resistance or energy loss.

For a video demonstation of how it’s done, check out this post:

The folks responsible for this voodoo are the superconductivity group at Tel Aviv University, led by Dr. Guy Deutscher. The goal of Deutscher’s lab – beyond amazing discoveries! – is to excite interest in the physics of superconductors for both young and old.

Link to the Superconductivity Group’s Webpage for more info:

http://www.quantumlevitation.com/levitation/Quantum_Levitation.html

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