TY  - JOUR
AU  - Baumgärtel, M.
AU  - Hell, M.
AU  - Das, S.
AU  - Wegewijs, M.R.
TI  - Transport and accumulation of spin anisotropy
JO  - Physical review letters
VL  - 107
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-19916
SP  - 087202
PY  - 2011
N1  - We acknowledge stimulating discussions with B. Sothmann, J. Konig, and S. Andergassen. and the financial support from NanoSci-ERA and DFG (FOR 912).
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000293921000023
DO  - DOI:10.1103/PhysRevLett.107.087202
UR  - https://juser.fz-juelich.de/record/19916
ER  -