Ballistic hole magnetic microscopy

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Haq, E. and Banerjee, T. and Siekman, M.H. and Lodder, J.C. and Jansen, R. (2005) Ballistic hole magnetic microscopy. Applied physics letters, 86 . 082502-1. ISSN 0003-6951

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Abstract:A technique to study nanoscale spin transport of holes is presented: ballistic hole magnetic microscopy. The tip of a scanning tunneling microscope is used to inject hot electrons into a ferromagnetic heterostructure, where inelastic decay creates a distribution of electron-hole pairs. Spin-dependent transmission of the excited hot holes into an underlying p-type semiconductor collector induces a hole current in the valence band of the semiconductor, with magnetocurrent values up to 180%. The spin-filtering of holes is used to obtain local hysteresis loops and magnetic imaging with spatial resolution better than 30 nm.
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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