IBM RESEARCH / SCIENCE PHOTO LIBRARY IBM RESEARCH / SCIENCE PHOTO LIBRARY
Quantum mirage, scanning tunnelling microscopy (STM) image. Thirty-six cobalt atoms were arranged in an elliptical structure known as a 'quantum corral'. This has the effect of producing a mirage as electron waves in the copper substrate interact with a magnetic cobalt atom (pink) at one of the foci of the ellipse, producing a phantom cobalt atom (not actually present) at the other focus. This research, carried out at IBM's Almaden centre, was published in 2000.
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