Experiments with semiconductors suggest that electrons may be able to evade the quantum limit by ganging up together.

ECONOMIST: Magnetism

They hope to see the quantum limit for the first time, and to find out whether electrons really do evade it.

ECONOMIST: Magnetism

Fortunately for experimentalists, some materials act rather like metals but are easier to push to the quantum limit because they give electrons less freedom to begin with.

ECONOMIST: Magnetism