2010•Applied Physics LettersRequires access

Control of spin-polarized current in a scanning tunneling microscope by single-atom transfer

Martin Ziegler, N. Ruppelt, N. Néel, J. Kröger, Richard Berndt

Abstract

The spin polarization of the tunneling current between a Cr-covered scanning tunneling microscope tip and a Fe-covered W(110) surface was controllably modified by transferring single Cr atoms from the tip to the surface. Reproducible reversal of the spin polarization enables the discrimination of magnetic from electronic properties without the need of an external magnetic field.

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Key concepts: Scanning tunneling microscope, Spin polarized scanning tunneling microscopy, Electrochemical scanning tunneling microscope, Microscope, Polarization (electrochemistry), Scanning tunneling spectroscopy, Condensed matter physics, Quantum tunnelling