Interface-Induced Conservation of Momentum Leads to Chiral-Induced Spin Selectivity.

  title={Interface-Induced Conservation of Momentum Leads to Chiral-Induced Spin Selectivity.},
  author={Clemens Vittmann and R. Kevin Kessing and James Lim and Susana F. Huelga and Martin Bodo Plenio},
  journal={The journal of physical chemistry letters},
We study the nonequilibrium dynamics of electron transmission from a straight waveguide to a helix with spin-orbit coupling. Transmission is found to be spin-selective and can lead to large spin polarizations of the itinerant electrons. The degree of spin selectivity depends on the width of the interface region, and no polarization is found for single-point couplings. We show that this is due to momentum conservation conditions arising from extended interfaces. We therefore identify interface… 
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