Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr${}_3$ Single Crystal

Abstract

Exciton fine structure splitting in semiconductors reflects the underlying symmetry of the crystal and quantum confinement. Since the latter factor strongly enhances the exchange interaction, most work has focused on nanostructures. Here, we report on the first observation of the bright exciton fine structure splitting in a bulk semiconductor crystal, where the impact of quantum confinement can be specifically excluded, giving access to the intrinsic properties of the material. Detailed investigation of the exciton photoluminescence and reflection spectra of a bulk methylammonium lead tribromide single crystal reveals a zero magnetic field splitting as large as $\sim 200\mu$eV. This result provides an important starting point for the discussion of the origin of the large bright exciton fine structure observed in perovskite nanocrystals.

arXiv commentjust accepted in Nano Letters (https://pubs.acs.org/doi/10.1021/acs.nanolett.9b02520)

References in corpus (18)

• Quantum Cryptography
• Experimental quantum teleportation
• Bright triplet excitons in lead halide perovskites
• Determination of the exciton binding energy and effective masses for the methylammonium and formamidinium lead tri-halide perovskite family
• Relativistic quasiparticle self-consistent electronic structure of hybrid halide perovskite photovoltaic absorbers
• Local polar fluctuations in lead halide perovskite crystals
• On-demand generation of indistinguishable polarization-entangled photon pairs
• Optical Phonons in Methylammonium Lead Halide Perovskites and Implications for Charge Transport
• Giant Rashba Splitting in CH3NH3PbBr3 Organic-Inorganic Perovskite
• Size-dependent fine-structure splitting in self-organized InAs/GaAs quantum dots
• The impact of the halide cage on the electronic properties of fully inorganic caesium lead halide perovskites
• Intrinsic femtosecond charge generation dynamics in a single crystal organometal halide perovskite
• Electric-field-induced coherent coupling of the exciton states in a single quantum dot
• Bright-exciton fine structures splittings in single perovskite nanocrystals
• Spin-split bands cause the indirect band gap of (CH${}_3$NH${}_3$)PbI${}_3$: Experimental evidence from circular photogalvanic effect
• Ultrafast THz probe of photo-induced polarons in lead-halide perovskites
• Carrier Lifetimes and Polaronic Mass Enhancement in the Hybrid Halide Perovskite CH${}_3$NH${}_3$PbI${}_3$ from Multiphonon Fröhlich Coupling
• Optical orientation and alignment of excitons in ensembles of inorganic perovskite nanocrystals

Cited by in corpus (5)

• Light-Emitting Diodes based on Metal Halide Perovskite and Perovskite Related Nanocrystals
• Revealing giant exciton fine-structure splitting in 2D perovskites using van der Waals passivation
• Photon echo polarimetry of excitons and biexcitons in a CH${}_3$NH${}_3$PbI${}_3$ perovskite single crystal
• Chasing Charge Carriers: Diffusion Dynamics in Mixed-n Quasi-Two-Dimensional Colloidal MAPbBr3 Perovskites
• Exciton-Selective Phonon Coupling in a Lead Halide Perovskite