Excited-state dynamics and optically detected magnetic resonance of solid-state spin defects from first principles
Not Available
Li, Kejun (ORCID:000000027364980X)↗
Engineering topics
Ping, Yuan (ORCID:0000000201233389)
Publications and source records attributed to Ping, Yuan (ORCID:0000000201233389).
Atomic doping to enhance the p-type behavior of BiFeO 3 photoelectrodes for solar H 2 O 2 production
Na-doped BiFeO 3 demonstrates an enhanced p-type behavior compared to p-type BiFeO 3 prepared without extrinsic dopants, and Na-doped BiFeO 3 can serve as a photocathode for solar O 2 reduction to H 2 O 2 when coupled with Ag nanoparticle catalysts.
Seo, Daye↗
How spin relaxes and dephases in bulk halide perovskites
Abstract Spintronics in halide perovskites has drawn significant attention in recent years, due to their highly tunable spin-orbit fields and intriguing interplay with lattice symmetry. Here, we perform first-principles calculations to determine the spin relaxation time ( T 1 ) and ensemble spin dephasing time ( $${T}_{2}^{*}$$ T 2 * ) in a prototype halide perovskite, CsPbBr 3 . To accurately capture spin dephasing in external magnetic fields we determine the Landé g -factor from first principles and take it into account in our calculations. These allow us to predict intrinsic spin lifetimes as an upper bound for experiments, identify the dominant spin relaxation pathways, and evaluate the dependence on temperature, external fields, carrier density, and impurities. We find that the Fröhlich interaction that dominates carrier relaxation contributes negligibly to spin relaxation, consistent with the spin-conserving nature of this interaction. Our theoretical approach may lead to new strategies to optimize spin and carrier transport properties.
74 ATOMIC AND MOLECULAR PHYSICS↗