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Physical Review Letters – 13 June 2003
Volume 90, Issue 23

Visualization of the electron density at an aluminum-oxide surface, from density-functional calculations. These calculations predict that the surface Al atoms will form a 1D electron gas that remains metallic down to a lower temperature ( < 1 K) than other existing 1DEG systems. The large gray balls are O atoms; the small green ones are Al atoms. [B. Razaznejad, C. Ruberto, P. Hyldgaard, and B. I. Lundqvist, Phys. Rev. Lett. 90, 236803 (2003)]

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