A 2D Double Perovskite Based on the Chiral Cystaminium Cation Exhibiting Multiple Switches in Quadratic Nonlinear Optical Response - Maria Maniadi; Nicolas Mercier; Alexandre Abhervé; Denis Gindre; Elodie Tailleur; Sébastien Pillet; Valérie Dupray; Christos Tyrpenou; George Volonakis (Journal of the American Chemical Society, 2025)