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26.
Synopsis
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Published August 25, 2008 By adsorbing and desorbing nitrogen dioxide, it is possible to add and remove charge carriers from graphene and induce a reversible metal-insulator transition. |
27.
Synopsis
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Published August 18, 2008 Researchers find that tunneling between the two layers of a bilayer two-dimensional electron gas is proportional to their area. Although the result may seem intuitive it poses a challenge to current theory. |
28.
Synopsis
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Published August 6, 2008 The formation of Landau levels in a magnetic field is the hallmark of a two-dimensional electron system, such as graphene. Experiments now suggest that Landau levels can also form in carbon nanotubes. |
29.
Synopsis
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Published August 5, 2008 Measurements show that the tunneling of electrons through a quantum dot has a complex dependence on magnetic field and the shape of the dot. These results challenge existing pictures of spin-dependent tunneling in quantum dot devices. |
30.
Viewpoint
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Physics 1, 7 (2008) – Published July 28, 2008 A decade ago, experimentalists showed that persistent currents can flow in nonsuperconducting mesoscopic metal rings, but there was no theory that correctly explained the magnitude or direction of the unexpectedly large currents. Theorists are now proposing a simple idea that may at last explain these results. |
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