Spin-Dependent Momentum Conservation of Electron-Phonon Scattering in Chirality-Induced Spin Selectivity, Clemens Vittmann, James Lim, Dario Tamascelli, Susana F. Huelga, and Martin B. Plenio, J. Phys. Chem. Lett. 2023, 14, XXX, 340–346
The elucidation of the mechanisms underpinning chiral-induced spin selectivity remains an out- standing scientific challenge. Here we consider the role of delocalized phonon modes in electron trans- port in chiral structures and demonstrate that spin selectivity can originate from spin-dependent energy and momentum conservation in electron-phonon scattering events. While this mechanism is robust to the specific nature of the vibrational modes, the degree of spin polarization depends on environmental factors, such as the specific temperature and phonon relaxation rates, as well as the presence of external driving fields. This parametric dependence is used to present experimentally testable predictions of our model.