Hall transport in Chirality Induced Spin Selective (MBA)₂PbI₄

The origin of Chirality Induced Spin Selectivity (CISS) remains a subject of considerable debate. In this project, we leverage a unique semiconducting CISS material, which enables spin filtering without the need for oriented monolayers, to fabricate devices for magnetotransport measurements aimed at elucidating the CISS phenomenon. In the first phase, we developed synthetic strategies to protect the material from air-induced degradation, facilitating its use in multi-terminal devices. We specifically compared the time-dependent transport properties of the CISS material when encapsulated in PMMA and silicon dioxide versus bare Hall bar structures. In the second phase, we conducted low-temperature magnetotransport measurements on Hall bars with asymmetric ferromagnetic contacts. These measurements allowed us to extract the spin diffusion length—a crucial parameter for understanding spin-orbit coupling and validating theoretical models.