Imaging Magnetic Focusing of Coherent Electron Waves - Condensed Matter Mesoscale and Nanoscale PhysicsReport as inadecuate




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Abstract: The magnetic focusing of electrons has proven its utility in fundamentalstudies of electron transport. Here we report the direct imaging of magneticfocusing of electron waves, specifically in a two-dimensional electron gas2DEG. We see the semicircular trajectories of electrons as they bounce alonga boundary in the 2DEG, as well as fringes showing the coherent nature of theelectron waves. Imaging flow in open systems is made possible by a cooledscanning probe microscope. Remarkable agreement between experiment and theorydemonstrates our ability to see these trajectories and to use this system as aninterferometer. We image branched electron flow as well as the interference ofelectron waves. This technique can visualize the motion of electron wavesbetween two points in an open system, providing a straightforward way to studysystems that may be useful for quantum information processing and spintronics.



Author: K.E. Aidala, R.E. Parrott, T. Kramer, E.J. Heller, R.M. Westervelt, M.P. Hanson, A.C. Gossard

Source: https://arxiv.org/







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