Spin valve effect in single-atom contacts

Details Spin valve effect in single-atom contacts Spin valve effect in single-atom contacts

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13h5011z&link_type=abstract

New Journal of Physics, Volume 13, Issue 8, pp. 085011 (2011).

Physics

1

Scientific paper

Magnetic single-atom contacts have been controllably fabricated with a scanning tunnelling microscope. A voltage-dependent spin valve effect with conductance variations of ≈40% is reproducibly observed from contacts comprising a Cr-covered tip and Co and Cr atoms on ferromagnetic nanoscale islands on W(110) with opposite magnetization. The spin-dependent conductances are interpreted from first-principles calculations in terms of the orbital character of the relevant electronic states of the junction.

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