Chiral Induced Spin Selectivity in Lead-Halide Hybrid Semiconductors and Semiconductor Interfaces

Understanding and the interconversion between spin and charge current under chirality induced spin selectivity (CISS) is critical in leverage chiral semiconductors for developing room-temperature control over spin, charge and light. To achieve their full application potential, an understanding of spin-relaxation in these systems are needed. We discuss spin-selective excitation of excitons in chiral 2D lead iodide perovskite (n = 1) single crystals using time- and polarization-resolved broad-band circular dichroism. Exciton spin relaxation times are studied at room temperature. We also studied the spin-dynamics using THz emission spectroscopy and report on the circular photogalvanic and inverse CISS effect. Controlling spin accumulation in semiconductor structures at room temperature is an essential component of the next generation of energy efficient optoelectronic technologies. I will discuss our recent results showing CISS enabled spin accumulation in III-V semiconductor optoelectronic structures.