| Issue |
Europhys. Lett.
Volume 73, Number 6, March 2006
|
|
|---|---|---|
| Page(s) | 941 - 947 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2005-10472-8 | |
| Published online | 10 February 2006 | |
Spin-polarized Andreev reflection tunneling through a precessing magnetic spin
1
Department of Physics, Shanghai University - Shanghai 200444, PRC
2
Department of Physics, Fudan University - Shanghai 200433, PRC
Received:
13
September
2005
Accepted:
16
January
2006
We study theoretically the spin-polarized Andreev reflection tunneling
through a local precessing magnetic spin weakly coupled to a
ferromagnet and to a superconductor. The linear Andreev reflection
conductance is obtained at zero temperature by using a nonequilibrium
Green function approach. It shows that the spin-exchange interaction
on the local spin-site can result in two spin-coherent states, from
which the Andreev reflection conductance resonance with either a
double peak or a single peak is developed. We find that the spin-orbit
interaction in the barrier between the local spin-site and the
ferromagnet-electrode leads only to a conductance oscillation with
base frequency twice the Larmor frequency, 
, and a
variable amplitude with equilibrium chemical potential and
spin-flip tunneling coupling.
PACS: 73.63.-b – Electronic transport in nanoscale materials and structure / 85.75.-d – Magnetoelectronics; spintronics: devices exploiting spin-polarized transport or integrated magnetic fields / 73.40.Gk – Tunneling
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.