SKM 2023 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 11: Spintronics, Spincalorics and Magnetotransport
TT 11.4: Talk
Monday, March 27, 2023, 15:45–16:00, HSZ 304
On the connection between the chiral-induced spin selectivity effect and the chiro-optical activity: The case of an electron in a helix — •Solmar Varela1, Gianaurelio Cuniberti1, Rafael Gutierrez1, Ernesto Medina2, Vladimiro Mujica3, and Jesus Ugalde4 — 1Chair of Materials Science and Nanotechnology, TU Dresden, Dresden — 2Departamento de \'isica, Colegio de Ciencias e Ingenier\'ia, Universidad San Francisco de Quito, Ecuador — 3School of Molecular Sciences, Arizona State University, USA — 4Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), Spain
We have obtained a connection between the chiro-optical activity and the spin-orbit interaction for a model system of an electron constrained to a helix, taking explicitly spin into account, in the presence of an electromagnetic field as a perturbation. Because of the chiral nature of the system, spatial inversion symmetry is broken, which in turn induces a connection between the electric and the magnetic responses of the system to the external electromagnetic field, that is absent in achiral systems. Despite the apparent simplicity of the model, it contains most of the relevant physics involved in this problem, and we have established a relationship between the optical activity response, via the Rosenfeld tensor and the spin polarization, defined as the average value of the Pauli spin-1/2 matrices. This relationship between the optical response and the CISS responses, can guide new efforts in the fields of reticular chemistry and material design for spintronics, and spin-selective chemistry.