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2D electron systems

Metals in flatland

Is it possible for a metal to exist in a strictly two-dimensional system? This may seem trivial, but it is actually a longstanding problem. The electrical characteristics of an array of superconducting islands on a normal metal suggests that the answer could be 'yes'.

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Figure 1: Phase diagram of a 2D metal.


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Correspondence to James F. Annett.

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Annett, J. Metals in flatland. Nature Phys 8, 8–9 (2012).

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