Spin dynamics in helical molecules with non-linear interactions

Abstract

It is widely admitted that the helical conformation of certain chiral molecules may induce a sizable spin selectivity observed in experiments. Spin selectivity arises as a result of the interplay between a helicity-induced spin-orbit coupling and electric dipole fields in the molecule. From the theoretical point of view, different phenomena might affect the spin dynamics in helical molecules, such as quantum dephasing, dissipation and the role of metallic contacts. Previous studies neglected the local deformation of the molecule about the carrier thus far, but this assumption seems unrealistic to describe charge transport in molecular systems. We introduce an effective model describing the electron spin dynamics in a deformable helical molecule with weak spin-orbit coupling. We find that the electron-lattice interaction allows the formation of stable solitons such as bright solitons with well defined spin projection onto the molecule axis. We present a thorough study of these bright solitons and analyze their possible impact on the spin dynamics in deformable helical molecules.

References in corpus (12)

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• Role of Exchange Interactions in the Magnetic Response and Intermolecular Recognition of Chiral Molecules
• Charge and Spin Dynamics and Enantioselectivity in Chiral Molecules
• Effective Hamiltonian model for helically constrained quantum systems within adiabatic perturbation theory: application to the Chirality-Induced Spin Selectivity (CISS) Effect
• The Chiral Induced Spin Selectivity Effect -- What It Is, What It Is Not, And Why It Matters
• Giant chirality-induced spin-selectivity of polarons
• Spin-polarized electron transmission in DNA-like systems
• Spectral problem for a two-component nonlinear Schrödinger equation in $2+1$ dimensions: Singular manifold method and Lie point symmetries
• Achiral dipoles on a ferromagnet can affect its magnetization direction
• Should it really be that hard to model the chirality induced spin selectivity effect?
• Derivative non-linear Schrödinger equation: Singular manifold method and Lie symmetries
• The temperature-dependent chiral-induced spin selectivity effect: Experiments and theory