Giant Rashba splitting in 2D organic-inorganic halide perovskites measured by transient spectroscopies.

ABSTRACT: Two-dimensional (2D) layered hybrid organic-inorganic halide perovskite semiconductors form natural "multiple quantum wells" that have strong spin-orbit coupling due to the heavy elements in their building blocks. This may lead to "Rashba splitting" close to the extrema in the electron bands. We have used a plethora of ultrafast transient, nonlinear optical spectroscopies and theoretical calculations to study the primary (excitons) and long-lived (free carriers) photoexcitations in thin films of 2D perovskite, namely, (C₆H₅C₂H₄NH₃)₂PbI₄. The density functional theory calculation shows the occurrence of Rashba splitting in the plane perpendicular to the 2D barrier. From the electroabsorption spectrum and photoinduc

SUBMITTER: Zhai Y 

PROVIDER: S-EPMC5533538 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature