Juan I. Climente
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View article: Electronic structure of InP/ZnSe quantum dots: effect of tetrahedral shape, valence band coupling and excitonic interactions
Electronic structure of InP/ZnSe quantum dots: effect of tetrahedral shape, valence band coupling and excitonic interactions Open
The energy levels and optical transitions of tetrahedral core/shell InP/ZnSe quantum dots (QDs) are investigated by means of multi-band k$\cdot$p theory. Despite the $\overline{T}_d$ symmetry relaxing spherical selection rules, the near-ba…
View article: Enhancement of the Biexciton Binding Energy in Laterally Confined CdSe Nanoplatelets
Enhancement of the Biexciton Binding Energy in Laterally Confined CdSe Nanoplatelets Open
Optical amplification in CdSe nanoplatelets (NPLs) has been linked to biexcitons with a large binding energy ΔBX, preventing dissociation at room temperature. While the exciton binding energy ΔX has been studied exten…
View article: Internal dynamics and dielectric screening of confined multiexciton states
Internal dynamics and dielectric screening of confined multiexciton states Open
Recent experimental and computational studies suggest that biexcitons (BX) confined in large CsPbBr$_3$ nanocrystals experience reduced dielectric screening as compared to excitons (X) and trions (X$^*$). Here we provide a physical rationa…
View article: Energy-Level Structure and Band Alignment in InP/ZnSe Core/Shell Quantum Dots
Energy-Level Structure and Band Alignment in InP/ZnSe Core/Shell Quantum Dots Open
Quantum dots (QDs) feature a sequence of discrete electron and hole energy levels that are often characterized by the envelope symmetry of the electron orbitals. Furthermore, these orbitals exhibit a specific localization in the case of co…
View article: Trions Stimulate Electronic Coupling in Colloidal Quantum Dot Molecules
Trions Stimulate Electronic Coupling in Colloidal Quantum Dot Molecules Open
Recent synthetic progress has enabled the controlled fusion of colloidal CdSe/CdS quantum dots in order to form dimers, manifesting electronic coupling in their optical response. While this "artificial H2 molecule" constitutes a…
View article: Binding energy of polaronic trions and biexcitons in CsPbBr$_3$ nanocrystals
Binding energy of polaronic trions and biexcitons in CsPbBr$_3$ nanocrystals Open
The effect of polaron formation on the ground state of excitons, trions and biexcitons confined in CsPbBr$_3$ nanocrystals is studied in the framework of effective mass Hamiltonians, using a Haken-like (Bajaj) potential for carrier-phonon …
View article: Electronic Structure of Trions in Layered Hybrid Lead Halide Perovskites
Electronic Structure of Trions in Layered Hybrid Lead Halide Perovskites Open
A theoretical description of trions in layered hybrid organic-inorganic lead halide perovskites is presented. The description is based on a variational effective mass model, including polaronic effects by means of a Haken potential, spatia…
View article: Trions Stimulate Electronic Coupling in Colloidal Quantum Dot Molecules
Trions Stimulate Electronic Coupling in Colloidal Quantum Dot Molecules Open
Recent synthetic progress has enabled the controlled fusion of colloidal CdSe/CdS quantum dots in order to form dimers manifesting electronic coupling in their optical response. While this ``artificial H2 molecule'' constitutes a milestone…
View article: Electronic Structure of Biexcitons in Metal Halide Perovskite Nanoplatelets
Electronic Structure of Biexcitons in Metal Halide Perovskite Nanoplatelets Open
A theoretical description of biexcitons in metal halide perovskite nanoplatelets is presented. The description is based on a variational effective mass model, including polaronic effects by means of a Haken potential. The strong quantum an…
View article: Hole Relaxation Bottlenecks in CdSe/CdTe/CdSe Lateral Heterostructures Lead to Bicolor Emission
Hole Relaxation Bottlenecks in CdSe/CdTe/CdSe Lateral Heterostructures Lead to Bicolor Emission Open
Concentric lateral CdSe/CdTe/CdSe heterostructures show bicolor photoluminescence from both a red charge transfer band of the CdSe/CdTe interface and a green fluorescence from CdSe. This work uses visible and near-infrared transient spectr…
View article: Lateral Confinement in 2D Nanoplatelets: A Strategy to Expand the Colloidal Quantum Engineering Toolbox
Lateral Confinement in 2D Nanoplatelets: A Strategy to Expand the Colloidal Quantum Engineering Toolbox Open
Among colloidal nanocrystals, 2D nanoplatelets offer a unique set of properties with exceptionally narrow luminescence and low lasing thresholds. Furthermore, their anisotropic shape expands the playground for the complex design of heteros…
View article: Infrared Imaging using thermally stable HgTe/CdS nanocrystals
Infrared Imaging using thermally stable HgTe/CdS nanocrystals Open
Transferring the nanocrystals (NCs) from the laboratory environment toward practical applications has raised new challenges. In the case of NCs for display and lightning, the focus was on reduced Auger recombination and maintaining lumines…
View article: Correction: Excitons in metal halide perovskite nanoplatelets: an effective mass description of polaronic, dielectric and quantum confinement effects
Correction: Excitons in metal halide perovskite nanoplatelets: an effective mass description of polaronic, dielectric and quantum confinement effects Open
Correction for ‘Excitons in metal halide perovskite nanoplatelets: an effective mass description of polaronic, dielectric and quantum confinement effects’ by Jose L. Movilla et al. , Nanoscale Adv. , 2023, 5 , 6093–6101, https://doi.org/10…
View article: Salvataje de megafístula con técnica de Nezakatgoo
Salvataje de megafístula con técnica de Nezakatgoo Open
Introducción: Se entiende por megafístula a una fístula arteriovenosa que se encuentra muy dilatada en todo su recorrido, tortuosa, en ocasiones aneurismática, y que presenta flujos por encima de 2L/min; esto conlleva el riesgo de generar …
View article: Salvage of Mega-fistula with Nezakatgoo Technique
Salvage of Mega-fistula with Nezakatgoo Technique Open
Introduction: Mega-fistula is understood as an arteriovenous fistula that is very dilated throughout its course, tortuous, sometimes aneurysmal, and that presents flows above 2L/min; this carries the risk of generating multiple complicatio…
View article: Excitons in layered metal halide perovskites: an effective mass description of polaronic, dielectric and quantum confinement effects
Excitons in layered metal halide perovskites: an effective mass description of polaronic, dielectric and quantum confinement effects Open
A theoretical model for excitons confined in layered metal halide perovskites is presented. The model accounts for polaronic effects, dielectric and quantum confinement by means of effective mass theory, image charges and Haken potentials.…
View article: Two Biexciton Types Coexisting in Coupled Quantum Dot Molecules
Two Biexciton Types Coexisting in Coupled Quantum Dot Molecules Open
Coupled colloidal quantum dot molecules (CQDMs) are an emerging class of nanomaterials, manifesting two coupled emission centers and thus introducing additional degrees of freedom for designing quantum-dot-based technologies. The propertie…
View article: Generalized method of image dyons for quasi-two dimensional slabs with ordinary - topological insulator interfaces
Generalized method of image dyons for quasi-two dimensional slabs with ordinary - topological insulator interfaces Open
Electrostatic charges near the interface between topological (TI) and ordinary (OI) insulators induce magnetic fields in the medium that can be described through the so-called method of image dyons (electric charge - magnetic monopole pair…
View article: Topological magnetoelectric effect in semiconductor nanostructures: Quantum wells, wires, dots, and rings
Topological magnetoelectric effect in semiconductor nanostructures: Quantum wells, wires, dots, and rings Open
Electrostatic charges placed near the interface between ordinary and topological insulators induce magnetic fields through the so-called topological magnetoelectric effect. Here we present a numerical implementation of the associated Maxwe…
View article: Two Biexciton Types Coexisting in Coupled Quantum Dot Molecules
Two Biexciton Types Coexisting in Coupled Quantum Dot Molecules Open
Coupled colloidal quantum dot molecules are an emerging class of nanomaterials, introducing new degrees of freedom for designing quantum dot-based technologies. The properties of multiply excited states in these materials are crucial to th…
View article: Generalized method of image dyons for quasi-two dimensional slabs with ordinary-topological insulator interfaces
Generalized method of image dyons for quasi-two dimensional slabs with ordinary-topological insulator interfaces Open
Electrostatic charges near the interface bewteen topological (TI) and ordinary (OI) insulators induce magnetic fields in the medium that can be described through the so-called method of image dyons (electric charge - magnetic monopole pair…
View article: Visible and Infrared Nanocrystal-Based Light Modulator with CMOS Compatible Bias Operation
Visible and Infrared Nanocrystal-Based Light Modulator with CMOS Compatible Bias Operation Open
Nanocrystals are now established light sources, and as synthesis and device integration have gained maturity, new functionalities can now be considered. So far, the emitted light from a nanocrystal population remains mostly driven by the s…
View article: Excitons in metal halide perovskite nanoplatelets: an effective mass description of polaronic, dielectric and quantum confinement effects
Excitons in metal halide perovskite nanoplatelets: an effective mass description of polaronic, dielectric and quantum confinement effects Open
An effective mass model for excitons confined in metal halide perovskite nanoplatelets is presented. Dielectric screening is weakened by the quasi-2D confinement, as the exciton radius becomes comparable to the polaron one.
View article: The topological magnetoelectric effect in semiconductor nanostructures: quantum wells, wires, dots and rings
The topological magnetoelectric effect in semiconductor nanostructures: quantum wells, wires, dots and rings Open
Electrostatic charges placed near the interface between ordinary and topological insulators induce magnetic fields, through the so-called topological magnetoelectric effect. Here, we present a numerical implementation of the associated Max…
View article: Double-crowned 2D semiconductor nanoplatelets with bicolor power-tunable emission
Double-crowned 2D semiconductor nanoplatelets with bicolor power-tunable emission Open
View article: Role of Thermally Occupied Hole States in Room‐Temperature Broadband Gain in CdSe/CdS Giant‐Shell Nanocrystals
Role of Thermally Occupied Hole States in Room‐Temperature Broadband Gain in CdSe/CdS Giant‐Shell Nanocrystals Open
Growing CdSe/CdS nanocrystals from a large CdSe core, and employing a giant CdS shell, a continuous, broadband gain spectrum, covering the spectral range between the CdSe and the CdS band edge, is induced. As revealed by k·p calculations, …
View article: Highly Charged Excitons and Biexcitons in Type-II Core/Crown Colloidal Nanoplatelets
Highly Charged Excitons and Biexcitons in Type-II Core/Crown Colloidal Nanoplatelets Open
The optoelectronic properties of type-II CdSe/CdTe colloidal nanoplatelets (NPLs) charged with neutral excitons (X0) have been intensively investigated in the last years. Motivated by the recent experimental progress, here we use effective…
View article: Changing Spin and Orbital Ground State Symmetries in Colloidal Nanoplatelets with Magnetic Fields
Changing Spin and Orbital Ground State Symmetries in Colloidal Nanoplatelets with Magnetic Fields Open
The symmetry of the electronic ground state is of paramount importance in determining the magnetic, optical, and electrical properties of semiconductor nanostructures. Here, it is shown theoretically that nontrivial spin and orbital symmet…
View article: Biexcitons in CdSe nanoplatelets: geometry, binding energy and radiative rate
Biexcitons in CdSe nanoplatelets: geometry, binding energy and radiative rate Open
The biexciton ground state of colloidal nanoplatelets is calculated using Variational Quantum Monte Carlo. The binding energy dependence on spatial and dielectric confinement is elucidated. The 2D Haynes rule is violated.
View article: Optimized Cation Exchange for Mercury Chalcogenide 2D Nanoplatelets and Its Application for Alloys
Optimized Cation Exchange for Mercury Chalcogenide 2D Nanoplatelets and Its Application for Alloys Open
II–VI two-dimensional (2D) nanoplatelets (NPLs) exhibit the narrowest optical features among nanocrystals (NCs). This property remains true for Hg-based NPLs, despite a cation exchange procedure to obtain them from Cd-based NPLs, which lea…