Journal Article

PreJuSER-19916

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Transport and accumulation of spin anisotropy

Baumgärtel, M.FZJ* ; Hell, M.FZJ* ; Das, S. ; Wegewijs, M. R.FZJ*

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/7409  doi:10.1103/PhysRevLett.107.087202

Abstract: We show that spin anisotropy can be transferred to an isotropic system by transport of a spin-quadrupole moment. We derive the quadrupole moment current and continuity equation and study a spin-valve structure consisting of two ferromagnets coupled to a quantum dot probing an impurity spin. The quadrupole backaction on their coupled spin results in spin torques and anisotropic spin relaxation which do not follow from standard spin-current considerations. We demonstrate the detection of the impurity spin by charge transport and its manipulation by electric fields.

Keyword(s): J

Note: We acknowledge stimulating discussions with B. Sothmann, J. Konig, and S. Andergassen. and the financial support from NanoSci-ERA and DFG (FOR 912).

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Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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