Spin polaron in a chiral molecule with an all quantum model.

Recently, the chiral induced spin selectivity (CISS) has been demonstrated in different systems such as DNA, proteins, bacteriorhodopsin, helicene and other chiral molecules. In this phenomenon, the spin of the carriers will couple with the chirality of the system and exhibit special transport properties. The explanation of the mechanisms of CISS is still under debating, but it generally accepted that the chirality-induced spin-orbit coupling and the environment play pivotal roles.

Spin-orbit coupling and the fine optical structure of chiral helical polymers.

With the discovery of the chiral-induced spin selectivity (CISS) effect, it has been recognized that spin and structural spin-orbit coupling (SOC) play important roles in the electro-optical properties of chiral materials. We redefine the spin-dependent current and magnetic moment operators to include chiral-induced SOC in a helical polymer and deduce optical absorption and circular dichroism (CD) formulae. The fine structure in the optical spectra is calculated for a helical polymer described with the tight-binding model.