Publications [#358702] of Volker Blum

Journal Articles

1. Jana, MK; Song, R; Xie, Y; Zhao, R; Sercel, PC; Blum, V; Mitzi, DB, Structural descriptor for enhanced spin-splitting in 2D hybrid perovskites., Nature Communications, vol. 12 no. 1 (August, 2021), pp. 4982 [doi]
   (last updated on 2023/06/01)

   Abstract:
   Two-dimensional (2D) hybrid metal halide perovskites have emerged as outstanding optoelectronic materials and are potential hosts of Rashba/Dresselhaus spin-splitting for spin-selective transport and spin-orbitronics. However, a quantitative microscopic understanding of what controls the spin-splitting magnitude is generally lacking. Through crystallographic and first-principles studies on a broad array of chiral and achiral 2D perovskites, we demonstrate that a specific bond angle disparity connected with asymmetric tilting distortions of the metal halide octahedra breaks local inversion symmetry and strongly correlates with computed spin-splitting. This distortion metric can serve as a crystallographic descriptor for rapid discovery of potential candidate materials with strong spin-splitting. Our work establishes that, rather than the global space group, local inorganic layer distortions induced via appropriate organic cations provide a key design objective to achieve strong spin-splitting in perovskites. New chiral perovskites reported here couple a sizeable spin-splitting with chiral degrees of freedom and offer a unique paradigm of potential interest for spintronics.