First-principles prediction of long spin lifetimes in materials with uniform internal magnetic fields*

Materials with long spatio-temporal spin-relaxation scales are critical for the realization of spintronic devices. The Dyakonov-Perel (DP) mechanism, wherein randomized spin-precession/mixing occurs due to scattering in a non-uniform internal magnetic field profile in the Brillouin zone, is the dominant relaxation mechanism in systems with broken inversion symmetry. We show that a wide class of hybrid perovskite materials exhibit near-perfect uniformity in the direction of the internal magnetic field, which is known to strongly suppress DP spin relaxation. Using a first-principles density-matrix framework for predicting spin relaxation in a wide class of materials, we computationally demonstrate increased spin life times in these materials. Finally, we investigate the impact of additional symmetry breaking, such as chirality, on the spin dynamics in such materials.