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

Ziegler, M.; Ruppelt, N.; Néel, N.; Kröger, J.; Berndt, R.
March 2010
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p132505
Academic Journal
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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