Spin Polarized Transport Through a Single-Molecule Magnet: Current-Induced Magnetic Switching

Details Spin Polarized Transport Through a Single-Molecule Magnet: Current-Induced Magnetic Switching Spin Polarized Transport Through a Single-Molecule Magnet: Current-Induced Magnetic Switching

2007-06-15

arxiv.org/abs/0706.2315v2

Phys. Rev. B 76, 54448 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages with 4 EPS figures; version as accepted for publication in Phys. Rev. B (more general model introduced)

Scientific paper

10.1103/PhysRevB.76.054448

Magnetic switching of a single-molecule magnet (SMM) due to spin-polarized current is investigated theoretically. The charge transfer between the electrodes takes place via the lowest unoccupied molecular orbital (LUMO) of the SMM. Generally, the double occupancy of the LUMO level, and a finite on-site Coulomb repulsion, is taken into account. Owing to the exchange interaction between electrons in the LUMO level and the SMM's spin, the latter can be reversed. The perturbation approach (Fermi golden rule) is applied to calculate current-voltage characteristics. The influence of Coulomb interactions on the switching process is also analyzed.

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