Chirality, Spin, and Charge Interactions at Magnet-chiral Molecule Interface in Chirality-Induced Spin Selectivity

Chirality-induced spin selectivity (CISS) generates giant spin polarization in transport through chiral molecules, paving the way for novel spintronic devices and enantiomer separation. Unlike conventional transport, CISS magnetoresistance (MR) violates Onsager’s reciprocal relation and exhibits significant resistance changes when reversing electrode magnetization at zero bias, with underlying mechanism remains unresolved. In this work [1], we propose that CISS MR originates from charge trapping that modifies the electron tunneling barrier and circumvents Onsager’s relation, distinct from spin polarization-based models. Our theory predicts exotic phenomena beyond the conventional CISS framework, including the chirality-induced one-way MR realized by our recent experiment on chiral gold nanoparticles [2].