Spin-polarized Shapiro steps and spin-precession-assisted multiple Andreev reflection

@inproceedings{Holmqvist2014SpinpolarizedSS,
  title={Spin-polarized Shapiro steps and spin-precession-assisted multiple Andreev reflection},
  author={Cecilia Holmqvist and Mikael Fogelstr{\"o}m and W Belzig},
  year={2014}
}
We investigate the charge and spin transport of a voltage-biased superconducting point contact coupled to a nanomagnet. The magnetization of the nanomagnet is assumed to precess with the Larmor frequency omega(L) when exposed to ferromagnetic resonance conditions. The Larmor precession locally breaks the spin-rotation symmetry of the quasiparticle scattering and generates spin-polarized Shapiro steps for commensurate Josephson and Larmor frequencies that lead to magnetization reversal. This… CONTINUE READING