Ballistic hole magnetic microscopy

E. Haq, T. Banerjee, M.H. Siekman, J.C. Lodder, R. Jansen

    Research output: Contribution to journalArticleAcademicpeer-review

    17 Citations (Scopus)

    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.
    Original languageEnglish
    Article number082502
    JournalApplied physics letters
    Volume86
    Issue number8
    DOIs
    Publication statusPublished - 2005

    Keywords

    • SMI-NE: From 2006 in EWI-NE
    • TSTNE-Probe-STM: Scanning Tunneling Microscope

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