Tunneling anisotropic magnetoresistance driven by resonant surface states: First-principles calculations of Fe(001) surface

Details Tunneling anisotropic magnetoresistance driven by resonant surface states: First-principles calculations of Fe(001) surface Tunneling anisotropic magnetoresistance driven by resonant surface states: First-principles calculations of Fe(001) surface

2006-10-03

arxiv.org/abs/cond-mat/0610061v2

Phys. Rev. Lett. 98, 046601 (2007)

Physics

Condensed Matter

Materials Science

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.98.046601

Fully-relativistic first-principles calculations of the Fe(001) surface demonstrate that resonant surface (interface) states may produce sizeable 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.

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