Magneto-optical Detection of Chirality Induced Spin Selectivity in 2D Chiral Hybrid Organic-Inorganic Perovskites*

The Chirality-Induced Spin Selectivity (CISS) effect, an appealing‘spin filtering’ effect arising from the chirality of materials has been demonstrated in various organic systems. The recent convergence of chiral molecules with metal halide frameworks gives rise to a new family of chiral systems: 2D chiral hybrid organic-inorganic perovskites (2D-chiral-HOIPs). This class of materials possesses both the implanted chirality and the excellent photovoltaic properties, making it a promising platform that bridges opto-spintronic studies and the CISS effect. Here we show the observation of light-induced CISS effect in the 2D-chiral-HOIPs detected by a magneto-optical measurement. It shows that the incident light changes the Kerr response of the ferromagnetic layer attached to the chiral-HOIP layer. The change of Kerr signal follows a linear relation with respect to the applied magnetic field, of which the sign of the slope depends on the chirality of the HOIPs. Our results pave a new route for employing 2D-chiral-HOIPs for future opto-spintronic applications.