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Photon-assisted electronic and spin transport through a precessing single-molecule magnet

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2014

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Filipović, Milena

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http://arxiv.org/abs/1412.3994

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We study the ac-charge and -spin transport through an orbital of a single molecule magnet precessing in a constant magnetic field. We assume that the source and drain contacts have time-dependent chemical potentials. We employ the Keldysh Green's functions method to calculate the spin and charge currents to linear order in the time-dependent potentials. The molecular and electronic spins are coupled via exchange interaction. The time-dependent molecular spin drives inelastic transitions between the Zeeman split orbital energy levels resulting in a rich structure in the transport characteristics. The time-dependent voltages allow to reveal the internal precession time scale (the Larmor frequency) by a dc-conductance measurement if the ac-frequency matches the Larmor frequency. Furthermore we show that the setup can be used to generate dc-spin currents with arbitrary magnetization direction by controlling the relative phases between the Larmor precession and the ac-voltage.

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ISO 690FILIPOVIĆ, Milena, Wolfgang BELZIG, 2014. Photon-assisted electronic and spin transport through a precessing single-molecule magnet
BibTex
@unpublished{Filipovic2014Photo-30970,
  year={2014},
  title={Photon-assisted electronic and spin transport through a precessing single-molecule magnet},
  author={Filipović, Milena and Belzig, Wolfgang}
}
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