Alessandro Surrente
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View article: Spin injection and emission helicity switching in a 2D perovskite/WSe2 heterostructure
Spin injection and emission helicity switching in a 2D perovskite/WSe2 heterostructure Open
The initialization and control of a long-lived spin population in lead halide perovskites are prerequisites for their use in spintronic applications. Here, we demonstrate circular polarization of the interlayer exciton emission in a (BA)2P…
View article: Tunable Broadband Emission via Self‐Trapped Excitons and Mn <sup>2+</sup> Energy Transfer in a 0D Hybrid Manganese Bromide
Tunable Broadband Emission via Self‐Trapped Excitons and Mn <sup>2+</sup> Energy Transfer in a 0D Hybrid Manganese Bromide Open
A novel 0D organic–inorganic hybrid manganese bromide, (TMBM) 2 MnBr 4 , based on bromomethyltrimethylammonium (TMBM) cations and isolated [MnBr 4 ] 2 ⁻ tetrahedra, is synthesized and structurally characterized. The material undergoes two …
View article: The impact of electrical contacts on the optical properties of a MoS$_{2}$ monolayer
The impact of electrical contacts on the optical properties of a MoS$_{2}$ monolayer Open
Achieving high performance in transition-metal-dichalcogenide-based optoelectronic devices is challenging -- the realization of an efficient electrical contacting scheme should not be obtained at the expense of their optical quality. Here …
View article: Quadrupolar excitons in MoSe2 bilayers
Quadrupolar excitons in MoSe2 bilayers Open
The quest for platforms to generate and control exotic excitonic states has greatly benefited from the advent of transition metal dichalcogenide (TMD) monolayers and their heterostructures. Among the unconventional excitonic states, quadru…
View article: Engineering the Effective Mass in 2D Perovskites via Octahedral Distortion
Engineering the Effective Mass in 2D Perovskites via Octahedral Distortion Open
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View article: Quadrupolar Excitons in MoSe$_2$ Bilayers
Quadrupolar Excitons in MoSe$_2$ Bilayers Open
The quest for platforms to generate and control exotic excitonic states has greatly benefited from the advent of transition metal dichalcogenide (TMD) monolayers and their heterostructures. Among the unconventional excitonic states, quadru…
View article: Polaronic Mass Enhancement and Polaronic Excitons in Metal Halide Perovskites
Polaronic Mass Enhancement and Polaronic Excitons in Metal Halide Perovskites Open
In metal halide perovskites the complex dielectric screening together with low energy of phonon modes leads to non-negligible Fr¨ohlich coupling. While this feature of perovskites has been already used to explain some of the puzzling aspec…
View article: Bright Excitonic Fine Structure in Metal-Halide Perovskites: From Two-Dimensional to Bulk
Bright Excitonic Fine Structure in Metal-Halide Perovskites: From Two-Dimensional to Bulk Open
The optical response of two-dimensional (2D) perovskites, often referred to as natural quantum wells, is primarily governed by excitons, whose properties can be readily tuned by adjusting the perovskite layer thickness. We have investigate…
View article: Control of the valley polarization of monolayer WSe<sub>2</sub> by Dexter-like coupling
Control of the valley polarization of monolayer WSe<sub>2</sub> by Dexter-like coupling Open
Intervalley scattering mechanisms strongly affect the dynamics of excitonic complexes in transition metal dichalcogenide monolayers. Here, we investigate the excitation energy dependence of the valley polarization of excitons in a WSe 2 mo…
View article: Exciton Fine Structure in 2D Perovskites: The Out‐of‐Plane Excitonic State
Exciton Fine Structure in 2D Perovskites: The Out‐of‐Plane Excitonic State Open
2D Ruddlesden‐Popper metal‐halide perovskites feature particularly strong excitonic effects, making them a fascinating playground for studying exciton physics. A complete understanding of the properties of this quasi‐particle is crucial to…
View article: Twist-angle dependent dehybridization of momentum-indirect excitons in MoSe<sub>2</sub>/MoS<sub>2</sub> heterostructures
Twist-angle dependent dehybridization of momentum-indirect excitons in MoSe<sub>2</sub>/MoS<sub>2</sub> heterostructures Open
The moiré superlattice has emerged as a powerful way to tune excitonic properties in two-dimensional van der Waals structures. However, the current understanding of the influence of the twist angle for interlayer excitons (IXs) in heterost…
View article: Approaching the Intrinsic Properties of Moiré Structures Using Atomic Force Microscopy Ironing
Approaching the Intrinsic Properties of Moiré Structures Using Atomic Force Microscopy Ironing Open
Stacking monolayers of transition metal dichalcogenides (TMDs) has led to the discovery of a plethora of new exotic phenomena, resulting from moiré pattern formation. Due to the atomic thickness and high surface-to-volume ratio of heterost…
View article: Dataset for magneto-optical spectroscopy of CsPbBr3-based perovskite nanoplatelets
Dataset for magneto-optical spectroscopy of CsPbBr3-based perovskite nanoplatelets Open
This dataset includes raw photoluminescence and transmission spectra acquired in a pulsed magnetic field. The values of the magnetic field in each acquisition frame of a given pulse are reported in the corresponding *.dat file. In this fil…
View article: Dataset for magneto-optical spectroscopy of CsPbBr3-based perovskite nanoplatelets
Dataset for magneto-optical spectroscopy of CsPbBr3-based perovskite nanoplatelets Open
This dataset includes raw photoluminescence and transmission spectra acquired in a pulsed magnetic field. The values of the magnetic field in each acquisition frame of a given pulse are reported in the corresponding *.dat file. In this fil…
View article: Polarization resolved data of (PEA)2PbI4 single crystal
Polarization resolved data of (PEA)2PbI4 single crystal Open
This dataset includes reflectivity (folder r) and photoluminescence (folder pl) spectra of a single crystal (PEA)2PbI4 measured as a function of the linear polarization of the detected signal. The measurements are carried out at 6K. The nu…
View article: Polarization resolved data of (PEA)2PbI4 single crystal
Polarization resolved data of (PEA)2PbI4 single crystal Open
This dataset includes reflectivity (folder r) and photoluminescence (folder pl) spectra of a single crystal (PEA)2PbI4 measured as a function of the linear polarization of the detected signal. The measurements are carried out at 6K. The nu…
View article: Fine Structure Splitting of Phonon-Assisted Excitonic Transition in (PEA)2PbI4 Two-Dimensional Perovskites
Fine Structure Splitting of Phonon-Assisted Excitonic Transition in (PEA)2PbI4 Two-Dimensional Perovskites Open
Two-dimensional van der Waals materials exhibit particularly strong excitonic effects, which causes them to be an exceptionally interesting platform for the investigation of exciton physics. A notable example is the two-dimensional Ruddles…
View article: Thickness-Dependent Dark-Bright Exciton Splitting and Phonon Bottleneck in CsPbBr<sub>3</sub>-Based Nanoplatelets Revealed via Magneto-Optical Spectroscopy
Thickness-Dependent Dark-Bright Exciton Splitting and Phonon Bottleneck in CsPbBr<sub>3</sub>-Based Nanoplatelets Revealed via Magneto-Optical Spectroscopy Open
The optimized exploitation of perovskite nanocrystals and nanoplatelets as highly efficient light sources requires a detailed understanding of the energy spacing within the exciton manifold. Dark exciton states are particularly relevant be…
View article: Strain-Induced Exciton Hybridization in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>WS</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> Monolayers Unveiled by Zeeman-Splitting Measurements
Strain-Induced Exciton Hybridization in Monolayers Unveiled by Zeeman-Splitting Measurements Open
Mechanical deformations and ensuing strain are routinely exploited to tune the band gap energy and to enhance the functionalities of two-dimensional crystals. In this Letter, we show that strain leads also to a strong modification of the e…
View article: Strain induced lifting of the charged exciton degeneracy in monolayer MoS<sub>2</sub> on a GaAs nanomembrane
Strain induced lifting of the charged exciton degeneracy in monolayer MoS<sub>2</sub> on a GaAs nanomembrane Open
Strain is a commonly used tool to tune the optoelectronic properties of semiconductors. It is especially effective for transition metal dichalcogenides (TMDs), which can withstand extreme strain up to 10%. To date, localised strain fields …
View article: Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound
Quantification of Exciton Fine Structure Splitting in a Two-Dimensional Perovskite Compound Open
Applications of two-dimensional (2D) perovskites have significantly outpaced the understanding of many fundamental aspects of their photophysics. The optical response of 2D lead halide perovskites is dominated by strongly bound excitonic s…
View article: Spatial Modulation of Vibrational and Luminescence Properties of Monolayer MoS₂ Using a GaAs Nanowire Array
Spatial Modulation of Vibrational and Luminescence Properties of Monolayer MoS₂ Using a GaAs Nanowire Array Open
The integration of transition-metal dichalcogenides (TMDs) with non-planar substrates such as nanopillars provides a way to spatially modify the optical properties mainly through the localized strain. Similar studies to date have utilized …
View article: Spectral Dependence of the Energy Transfer from Photosynthetic Complexes to Monolayer Graphene
Spectral Dependence of the Energy Transfer from Photosynthetic Complexes to Monolayer Graphene Open
Fluorescence excitation spectroscopy at cryogenic temperatures carried out on hybrid assemblies composed of photosynthetic complexes deposited on a monolayer graphene revealed that the efficiency of energy transfer to graphene strongly dep…
View article: Vibrational Properties in Highly Strained Hexagonal Boron Nitride Bubbles
Vibrational Properties in Highly Strained Hexagonal Boron Nitride Bubbles Open
Hexagonal boron nitride (hBN) is widely used as a protective layer for few-atom-thick crystals and heterostructures (HSs), and it hosts quantum emitters working up to room temperature. In both instances, strain is expected to play an impor…
View article: Interlayer excitons in MoSe<sub>2</sub>/2D perovskite hybrid heterostructures – the interplay between charge and energy transfer
Interlayer excitons in MoSe<sub>2</sub>/2D perovskite hybrid heterostructures – the interplay between charge and energy transfer Open
Investigation of 2D perovskite/MoSe 2 heterostructures shows that the charge transfer leads to the formation of inter-layer excitons.
View article: Perspective on the physics of two-dimensional perovskites in high magnetic field
Perspective on the physics of two-dimensional perovskites in high magnetic field Open
Two-dimensional (2D) metal halide perovskites consist of atomically thin layers composed of low bandgap metal-halide slabs, surrounded by high bandgap organic ligands, which behave as barriers. In this Perspective, we highlight how the use…
View article: Revealing Excitonic Phonon Coupling in (PEA)<sub>2</sub>(MA)<sub><i>n</i>−1</sub>Pb<sub><i>n</i></sub>I<sub>3<i>n</i>+1</sub> 2D Layered Perovskites
Revealing Excitonic Phonon Coupling in (PEA)<sub>2</sub>(MA)<sub><i>n</i>−1</sub>Pb<sub><i>n</i></sub>I<sub>3<i>n</i>+1</sub> 2D Layered Perovskites Open
The family of 2D Ruddlesden-Popper perovskites is currently attracting great interest of the scientific community as highly promising materials for energy harvesting and light emission applications. Despite the fact that these materials ar…
View article: Symmetry Breakdown in Franckeite: Spontaneous Strain, Rippling, and Interlayer Moiré
Symmetry Breakdown in Franckeite: Spontaneous Strain, Rippling, and Interlayer Moiré Open
Franckeite is a naturally occurring layered mineral with a structure composed of alternating stacks of SnS2-like and PbS-like layers. Although this superlattice is composed of a sequence of isotropic two-dimensional layers, it e…
View article: Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr<sub>3</sub> Single Crystal
Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr<sub>3</sub> Single Crystal Open
Exciton fine structure splitting in semiconductors reflects the underlying symmetry of the crystal and quantum confinement. Because the latter factor strongly enhances the exchange interaction, most work has focused on nanostructures. Here…
View article: Phase-Transition-Induced Carrier Mass Enhancement in 2D Ruddlesden–Popper Perovskites
Phase-Transition-Induced Carrier Mass Enhancement in 2D Ruddlesden–Popper Perovskites Open
There is a variety of possible ways to tune the optical properties of 2D perovskites, though the mutual dependence between different tuning parameters hinders our fundamental understanding of their properties. In this work we attempt to ad…