Egelhoff Jr., W.
, Stiles, M.
, Pappas, D.
, Alvarado, S.
, Gregg, J.
, Bland, J.
, Buhrman, R.
, Pierce, D.
, Byers, J.
, Johnson, M.
and Jonker, B.
(2002),
Spin Polarization of Injected Electrons, Science, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=620540
(Accessed October 11, 2024)
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Spin Polarization of Injected Electrons
Published
Author(s)
, , , S Alvarado, J Gregg, J Bland, R A. Buhrman, , J Byers, M Johnson, B Jonker
Abstract
A recent paper in Science made the claim of 92% polarization for the injection spin polarized electrons from a Ni scanning tunneling microscopy (STM) tip into GaAs(110). Actually they state their result as 92% efficiency for the injection of 100% importance for the emerging field of Spintronics. If true, it would suggest that the field is rapidly closing in on the key goal of 100% efficiency. However, we wish to inform the Science readership that the claim is by no means substantiated by a close examination of the work, and in fact serious errors in the analysis imply that the actual polarization was much less than 92%. Since the tip is not 100% spin polarized, it makes no sense to break this polarization into a tip polarization times an efficiency.Citation
Science
Volume
296
Issue
No. 5571
Pub Type
Journals
Download Paper
Keywords
gallium arsnide tunneling nickel, spin polarization
Citation
Issues
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Created May 16, 2002, Updated October 12, 2021