Giant Rashba Splitting in CH3NH3PbBr3 Organic-Inorganic Perovskite

Abstract

As they combine decent mobilities with extremely long carrier lifetimes, organic-inorganic perovskites have opened a whole new field in opto\-electronics. Measurements of their underlying electronic structure, however, are still lacking. Using angle-resolved photoelectron spectroscopy, we measure the valence band dispersion of single-crystal CH${}_3$NH${}_3$PbBr${}_3$. The dispersion of the highest energy band is extracted applying a modified leading edge method, which accounts for the particular density of states of organic-inorganic perovskites. The surface Brillouin zone is consistent with bulk-terminated surfaces both in the low-temperature orthorhombic and the high-temperature cubic phase. In the low-temperature phase, we find a ring-shaped valence band maximum with a radius of 0.043 Å${}^{-1}$, centered around a 0.16 eV deep local minimum in the dispersion of the valence band at the high-symmetry point. Intense circular dichroism is observed. This dispersion is the result of strong spin-orbit coupling. Spin-orbit coupling is also present in the room-temperature phase. The coupling strength is one of the largest reported so far.

References in corpus (6)

• Relativistic Solar Cells
• Relativistic quasiparticle self-consistent electronic structure of hybrid halide perovskite photovoltaic absorbers
• Revealing the role of organic cations in hybrid halide perovskites CH3NH3PbI3
• Relativistic origin of slow electron-hole recombination in hybrid halide perovskite solar cells
• From soft harmonic phonons to fast relaxational dynamics in CH${}_3$NH${}_3$PbBr${}_3$
• Optical Spintronics in Organic-Inorganic Perovskite Photovoltaics

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• Identification of Free and Bound Exciton States and Their Phase-Dependent Trapping Behavior in Lead Halide Perovskites
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• Quantifying Charge Carrier Mobilities and Recombination Rates in Metal Halide Perovskites from Time-Resolved Microwave Photo-conductivity Measurements
• Dynamic Symmetry Breaking and Spin Splitting in Metal Halide Perovskites
• Rashba-like spin splitting along three momentum directions in trigonal layered PtBi2
• Orbital-driven Rashba effect in a binary honeycomb monolayer AgTe
• Circularly polarized electroluminescence from a single-crystal organic microcavity light-emitting diode based on photonic spin-orbit interactions
• Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr${}_3$ Single Crystal
• Temperature-dependent optical spectra of single-crystal (CH${}_3$NH${}_3$)PbBr${}_3$ cleaved in ultrahigh vacuum
• Rashba-Dresselhaus Effect in Inorganic/Organic Lead Iodide Perovskite Interfaces
• Effect of disorder on transport properties in a tight-binding model for lead halide perovskites
• Ultrafast Control of Excitonic Rashba Fine Structure by Phonon Coherences in a Metal Halide Perovskite CH${}_3$NH${}_3$PbI${}_3$
• Local Symmetry Breaking Drives Picosecond Spin Domain Formation in Polycrystalline Semiconducting Films
• Circular Photogalvanic Effect in Organometal Halide Perovskite CH${}_3$NH${}_3$PbI${}_3$
• Valence Band Dispersion Measurements of Perovskite Single Crystal with Angle-resolved Photoemission Spectroscopy
• Tunable spin textures in polar antiferromagnetic hybrid organic inorganic perovskites by electric and magnetic fields
• Temperature dependence of the bulk Rashba splitting in the bismuth tellurohalides
• Molecular orientational melting within a lead-halide octahedra framework - the order-disorder transition in CH3NH3PbBr3
• Clearly Discriminate the Continuum Band and Exciton State of the Hybrid Lead Bromide Perovskite
• Polar or nonpolar? That is not the question for perovskite solar cells
• Rashba and Dresselhaus effects in 2D Pb-I-based perovskites
• Switchable enhanced spin photocurrent in Rashba and cubic Dresselhaus ferroelectric semiconductors
• Origin of Rashba spin-splitting and strain tunability in ferroelectric bulk CsPbF${}_3$
• Structural dynamics in hybrid halide perovskites: Bulk Rashba splitting, spin texture, and carrier localization
• Realization of exciton-mediated optical spin-orbit interaction in organic microcrystalline resonators
• Noncollinear electric dipoles in a polar, chiral phase of CsSnBr${}_3$ perovskite
• Giant Inverse Rashba-Edelstein Effect: Application to Monolayer OsBi${}_2$
• Optical spin transfer and spin-orbit torques in thin film ferromagnets
• Spin-Electric Coupling in Lead Halide Perovskites
• Anisotropy of transport in bulk Rashba metals
• Ultrafast acoustic phonon scattering in CH${}_3$NH${}_3$PbI${}_3$ revealed by femtosecond four-wave mixing
• Lead-free Hybrid Perovskite: An Efficient Room Temperature Spin Generator via Large Interfacial Rashba effect
• Pair spin-orbit interaction in low-dimensional electron systems
• Electronic Coupling between the Unoccupied States of the Organic and Inorganic Sub-Lattices of Methylammonium Lead Iodide a Hybrid Organic-Inorganic Perovskite Single Crystal
• Rashba Effect and Raman Spectra of Tl${}_2$O/PtS${}_2$ Heterostructure
• Trigonal warping induced terraced spin texture and nearly perfect spin polarization in graphene with Rashba effect
• Thermal fluctuations and carrier localization induced by dynamic disorder in MAPbI3 described by a first-principles based tight-binding model
• n-type Rashba Spin Splitting in a Bilayer Inorganic Halide Perovskite with External Electric Field
• Quasiclassical theory of the spin-orbit magnetoresistance of three-dimensional Rashba metals
• Electron Interactions in Rashba Materials
• Visualization of Unconventional Rashba Band and Vortex Zero Mode in Topopogical Superconductor Candidate AuSn${}_4$
• Radiative recombination of large polarons in halide perovskites
• Observation of Analogue Dynamic Schwinger Effect and Non-Perturbative Light Sensing in Lead Halide Perovskites
• Distinguishing between dynamical and static Rashba effects in hybrid perovskite nanocrystals using transient absorption spectroscopy
• Massive Dirac-Pauli physics in lead-halide perovskites
• Transport properties of Rashba conducting strips coupled to magnetic moments with spiral order
• Exciton-Selective Phonon Coupling in a Lead Halide Perovskite
• Review: Solid-state physics of halide perovskites