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Evidence of a symmetry-dependent metallic barrier in fully epitaxial MgO based magnetic tunnel junctions.
- Source :
-
Physical review letters [Phys Rev Lett] 2007 Nov 02; Vol. 99 (18), pp. 187202. Date of Electronic Publication: 2007 Nov 01. - Publication Year :
- 2007
-
Abstract
- We report on the experimental observation of tunneling across an ultrathin metallic Cr spacer layer that is inserted at the interface of a Fe/MgO/Fe(001) junction. We show how this remarkable behavior in a solid-state device reflects a quenching in the transmission of particular electronic states, as expected from the symmetry-filtering properties of the MgO barrier and the band structure of the bcc Cr(001) spacer in the epitaxial junction stack. This ultrathin Cr metallic barrier can promote quantum well states in an adjacent Fe layer.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 99
- Issue :
- 18
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 17995434
- Full Text :
- https://doi.org/10.1103/PhysRevLett.99.187202