Phys. Rev. Lett. 98, 046601 (2007) [4 pages]Tunneling Anisotropic Magnetoresistance Driven by Resonant Surface States: First-Principles Calculations on an Fe(001) SurfaceReceived 28 September 2006; published 24 January 2007 Fully relativistic first-principles calculations of the Fe(001) surface demonstrate that resonant surface (interface) states may produce sizable tunneling anisotropic magnetoresistance in magnetic tunnel junctions with a single magnetic electrode. The effect is driven by the spin-orbit coupling. It shifts the resonant surface band via the Rashba effect when the magnetization direction changes. We find that spin-flip scattering at the interface is controlled not only by the strength of the spin-orbit coupling, but depends strongly on the intrinsic width of the resonant surface states. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.046601
DOI:
10.1103/PhysRevLett.98.046601
PACS:
72.25.Mk, 73.23.−b, 73.40.Gk, 75.47.−m
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