Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 69: Poster: Spin Phenomena in Chiral Molecular Systems

O 69.4: Poster

Mittwoch, 20. März 2024, 18:00–20:00, Poster C

Theory for phonon-mediated chirality-induced spin selectivity — •Namgee Cho, Thibaut Lacroix, James Lim, Susana F. Huelga, and Martin B. Plenio — Institut für Theoretische Physik, Universität Ulm, D-89081 Ulm, Germany

Chirality-induced spin selectivity (CISS) is an intriguing phenomenon where the chirality of organic molecules induces significant spin selectivity in various electronic processes, such as bound electron transport, photoelectron transmission and chemical reactions. Although the CISS effects have been demonstrated in various experiments, the underlying mechanism is still unknown. Recently, the influence of electron-phonon interaction on CISS has attracted considerable interest. However, the previous theoretical studies have considered simplified models where phonon degrees of freedom are treated classically or approximately described by a single quantum harmonic oscillator. In this work, we consider a pseudo-mode theory where multiple quantum harmonic oscillators under Lindblad noise effectively describe non-Markovian phonon baths inducing fluctuations in electronic parameters of chiral molecules. We investigate how the electron-phonon interaction leads to CISS effects in charge separation and how the degree of spin polarization depends on environmental parameters.

Keywords: Chirality-induced spin selectivity; Electron-phonon interaction