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Letter

Nature Physics 3, 464–468 (1 July 2007) | doi:10.1038/nphys628

Imaging magnetic focusing of coherent electron waves

Katherine E. Aidala , Robert E. Parrott , Tobias Kramer , E. J. Heller , R. M. Westervelt , M. P. Hanson & A. C. Gossard

The coherent flow of electrons through a two-dimensional electron gas (2DEG) offers promising approaches for spintronics and quantum information processing. Cryogenic scanning probe microscopes (SPMs) are a valuable tool for imaging electron motion, but have been limited by their inability to follow such motion through an open structure under an applied magnetic field.