Spin-transfer torque on a single magnetic adatom

Details Spin-transfer torque on a single magnetic adatom Spin-transfer torque on a single magnetic adatom

2009-11-18

arxiv.org/abs/0911.3478v1

Phys. Rev. Lett. 104, 026601 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.104.026601

We theoretically show how the spin orientation of a single magnetic adatom can be controlled by spin polarized electrons in a scanning tunneling microscope configuration. The underlying physical mechanism is spin assisted inelastic tunneling. By changing the direction of the applied current, the orientation of the magnetic adatom can be completely reversed on a time scale that ranges from a few nanoseconds to microseconds, depending on bias and temperature. The changes in the adatom magnetization direction are, in turn, reflected in the tunneling conductance.

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