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Trilayer graphene exhibits quantum effect

Three could be the magic number for making spintronic devices from thin carbon sheets

3:27pm, September 28, 2011

When stacked like lasagna noodles, the thinnest material on the planet changes what it can do — and what those trying to make devices out of it might do with it.

Electrons act funny in three sheets of atom-thick carbon, or graphene, arranged just so. The particles’ masses seem to change in an unusual way that depends on the electrons’ speed.

“The slower these particles move, the heavier they become,” says Igor Zaliznyak, a physicist at Brookhaven National Laboratory in Upton, N.Y., whose team reports this property online September 25 in Nature Physics.

That’s the opposite of electrons in

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