J. Ávila
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View article: Tunable electronic band structure in WS 2(1-x) Se 2x van der Waals Alloys
Tunable electronic band structure in WS 2(1-x) Se 2x van der Waals Alloys Open
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View article: Electric Field Distribution within a Van der Waals Heterostructure
Electric Field Distribution within a Van der Waals Heterostructure Open
Van der Waals heterostructures offer a playground for optoelectronics with the promise of coupling a broad range of materials while lifting the constraints of epitaxy. Optimization of such devices also requires careful control of the spati…
View article: OPEN-SOURCE SOFTWARE DEVELOPMENT FOR THE ASSISTANT OF STRUCTURAL DESIGN PROCESS IN ETABS, APPLYING COLOMBIAN SEISMIC NORMATIVE NSR-10.
OPEN-SOURCE SOFTWARE DEVELOPMENT FOR THE ASSISTANT OF STRUCTURAL DESIGN PROCESS IN ETABS, APPLYING COLOMBIAN SEISMIC NORMATIVE NSR-10. Open
In the academic and professional field of civil engineering, software development is essential for efficiency and precision in structural design of buildings. In this context, an open-source software is created that acts as an assistant in…
View article: Graphene as Infrared and Electron Transparent Electrode Applied to the Design of Narrow Bandgap Nanocrystal‐Based Photodiode
Graphene as Infrared and Electron Transparent Electrode Applied to the Design of Narrow Bandgap Nanocrystal‐Based Photodiode Open
Colloidal nanocrystals (NCs) are a promising platform for infrared optoelectronics. Current efforts focus on designing NCs that absorb in the short‐ and mid‐wave infrared and integrating them into diode stacks. A major challenge is to coup…
View article: Adsorption and Thermal Stability of Ionic Liquid Multilayers on ZnO Surfaces
Adsorption and Thermal Stability of Ionic Liquid Multilayers on ZnO Surfaces Open
Ionic liquids (ILs) have been explored as a way of improving the performance of ZnO-based optoelectronic devices; however, there are few fundamental studies of the IL/ZnO interface. Here, the adsorption of the IL 1-octyl-3-methylimidazoliu…
View article: Operando Photoemission Imaging of the Energy Landscape from a 2D Material-Based Field-Effect Transistor
Operando Photoemission Imaging of the Energy Landscape from a 2D Material-Based Field-Effect Transistor Open
As the integration of transition metal dichalcogenides (TMDC) becomes more advanced for optoelectronics, it is increasingly relevant to develop tools that can correlate the structural properties of the materials with their electrical outpu…
View article: Space Charge Doping Induced Band Modulation in Mono- and Bi-layer Graphene: a nano-ARPES study
Space Charge Doping Induced Band Modulation in Mono- and Bi-layer Graphene: a nano-ARPES study Open
Controlled modulation of electronic band structure in two-dimensional (2D) materials via doping is crucial for devices fabrication. For instance doped graphene has been envisaged for various applications like sensors, super-capacitors, tra…
View article: Environmental effects on the electronic states of MoS<sub>2</sub> flakes probed by micro-ARPES
Environmental effects on the electronic states of MoS<sub>2</sub> flakes probed by micro-ARPES Open
A spatially resolved angle-resolved photoelectron spectroscopy investigation at the micron scale reveals the effects of the external environment on exfoliated MoS 2 multilayers.
View article: <i>Operando</i> observation of gate defects in quantum dot-based field effect transistors
<i>Operando</i> observation of gate defects in quantum dot-based field effect transistors Open
This article explores, using X-ray photoemission imaging, how the damage to the gate of a nanocrystal-based field-effect transistor affects the device energy landscape.
View article: <i>In situ</i> investigation of 1T′/1H phase transition in colloidal WS <sub>2</sub> monolayers
<i>In situ</i> investigation of 1T′/1H phase transition in colloidal WS <sub>2</sub> monolayers Open
In situ study of colloidal WS 2 monolayers shows reducing-ligand stabilization of 1T′ up to 300 °C. At higher temperature, transition to 1H occurs with kinetics controlled by nanosheet size and surface chemistry.
View article: Nano-ARPES investigation of structural relaxation in small angle twisted bilayer tungsten disulfide
Nano-ARPES investigation of structural relaxation in small angle twisted bilayer tungsten disulfide Open
The diverse and intriguing phenomena observed in twisted bilayer systems, such as graphene and transition-metal dichalcogenides, prompted new questions about the emergent effects that they may host. However, the practical challenge of real…
View article: Automatic extraction of fine structural information in angle-resolved photoemission spectroscopy by multi-stage clustering algorithm
Automatic extraction of fine structural information in angle-resolved photoemission spectroscopy by multi-stage clustering algorithm Open
Unsupervised clustering method has shown strong capabilities in automatically categorizing the ARPES (ARPES: angle-resolved photoemission spectroscopy) spatial mapping dataset. However, there is still room for improvement in distinguishing…
View article: Correlated topological flat bands in rhombohedral graphite
Correlated topological flat bands in rhombohedral graphite Open
Flat bands and nontrivial topological physics are two important topics of condensed matter physics. With a unique stacking configuration analogous to the Su–Schrieffer–Heeger model, rhombohedral graphite (RG) is a potential candidate for r…
View article: Unconventional Spectral Gaps Induced by Charge Density Waves in the Weyl Semimetal (TaSe<sub>4</sub>)<sub>2</sub>I
Unconventional Spectral Gaps Induced by Charge Density Waves in the Weyl Semimetal (TaSe<sub>4</sub>)<sub>2</sub>I Open
Coupling Weyl quasiparticles and charge density waves (CDWs) can lead to fascinating band renormalization and many-body effects beyond band folding and Peierls gaps. For the quasi-one-dimensional chiral compound (TaSe4)2I with an incommens…
View article: Operando investigation of nanocrystal-based device energy landscape: Seeing the current pathway
Operando investigation of nanocrystal-based device energy landscape: Seeing the current pathway Open
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View article: Synergistic Effect of He for the Fabrication of Ne and Ar Gas-Charged Silicon Thin Films as Solid Targets for Spectroscopic Studies
Synergistic Effect of He for the Fabrication of Ne and Ar Gas-Charged Silicon Thin Films as Solid Targets for Spectroscopic Studies Open
Sputtering of silicon in a He magnetron discharge (MS) has been reported as a bottom-up procedure to obtain He-charged silicon films (i.e., He nanobubbles encapsulated in a silicon matrix). The incorporation of heavier noble gases is demon…
View article: Evolution of flat band and role of lattice relaxations in twisted bilayer graphene
Evolution of flat band and role of lattice relaxations in twisted bilayer graphene Open
Magic-angle twisted bilayer graphene (MATBG) exhibits correlated phenomena such as superconductivity and Mott insulating state related to the weakly dispersing flat band near the Fermi energy. Beyond its moiré period, such flat band is exp…
View article: Synergistic Effect of He for the Fabrication of Ne and Ar Gas-Charged Silicon Thin Films as Solid Targets for Spectroscopic Studies
Synergistic Effect of He for the Fabrication of Ne and Ar Gas-Charged Silicon Thin Films as Solid Targets for Spectroscopic Studies Open
: Sputtering of silicon in a Helium magnetron discharge (MS) has been reported as a bottom-up procedure to obtain He-charged silicon films (i.e. He nanobubbles encapsulated in a silicon matrix). The incorporation of heavier noble gases is …
View article: Photoemission Insight on Narrow Band Gap PbS Quantum Dots Relevant for Infrared Imaging
Photoemission Insight on Narrow Band Gap PbS Quantum Dots Relevant for Infrared Imaging Open
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View article: Using wafer scale ferroelectric domains of LiNbO3 to form permanent planar <i>p</i>–<i>n</i> junction in narrow band gap nanocrystals
Using wafer scale ferroelectric domains of LiNbO3 to form permanent planar <i>p</i>–<i>n</i> junction in narrow band gap nanocrystals Open
p–n junctions based on nanocrystals now serve as fundamental components in optoelectronics. However, the process of designing these p–n junctions has largely relied on empirical choices, either for ligand exchange or for the selection of c…
View article: Nano-ARPES investigation of twisted bilayer tungsten disulfide
Nano-ARPES investigation of twisted bilayer tungsten disulfide Open
The diverse and intriguing phenomena observed in twisted bilayer systems, such as graphene and transition metal dichalcogenides, prompted new questions about the emergent effects that they may host. However, the practical challenge of real…
View article: Electronic Band Structure Changes across the Antiferromagnetic Phase Transition of Exfoliated MnPS<sub>3</sub> Flakes Probed by μ-ARPES
Electronic Band Structure Changes across the Antiferromagnetic Phase Transition of Exfoliated MnPS<sub>3</sub> Flakes Probed by μ-ARPES Open
Exfoliated magnetic 2D materials enable versatile tuning of magnetization, e.g., by gating or providing proximity-induced exchange interaction. However, their electronic band structure after exfoliation has not been probed, presumably due …
View article: Programming twist angle and strain profiles in 2D materials
Programming twist angle and strain profiles in 2D materials Open
Moiré superlattices in twisted two-dimensional materials have generated tremendous excitement as a platform for achieving quantum properties on demand. However, the moiré pattern is highly sensitive to the interlayer atomic registry, and c…
View article: In Situ Mapping of the Vectorial Electric Field within a Nanocrystal-Based Focal Plane Array Using Photoemission Microscopy
In Situ Mapping of the Vectorial Electric Field within a Nanocrystal-Based Focal Plane Array Using Photoemission Microscopy Open
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View article: On the Suitable Choice of Metal for HgTe Nanocrystal-Based Photodiode: To Amalgam or Not to Amalgam
On the Suitable Choice of Metal for HgTe Nanocrystal-Based Photodiode: To Amalgam or Not to Amalgam Open
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View article: Visualizing crystal twin boundaries of bismuth by high-spatial-resolution ARPES
Visualizing crystal twin boundaries of bismuth by high-spatial-resolution ARPES Open
We have performed micro-/nanofocused angle-resolved photoemission spectroscopy (ARPES) on cleaved single-crystal surfaces of bismuth to clarify the spatially resolved electronic states. While the dominant area of the cleaved surface was fo…
View article: Coupling Ferroelectric to colloidal Nanocrystals as a Generic Strategy to Engineer the Carrier Density Landscape
Coupling Ferroelectric to colloidal Nanocrystals as a Generic Strategy to Engineer the Carrier Density Landscape Open
The design of infrared nanocrystals‐based (NCs) photodiodes faces a major challenge related to the identification of barriers with a well‐suited band alignment or strategy to finely control the carrier density. Here, this study explores a …
View article: Robustness of Momentum-Indirect Interlayer Excitons in MoS<sub>2</sub>/WSe<sub>2</sub> Heterostructure against Charge Carrier Doping
Robustness of Momentum-Indirect Interlayer Excitons in MoS<sub>2</sub>/WSe<sub>2</sub> Heterostructure against Charge Carrier Doping Open
Monolayer transition-metal dichalcogenide (TMD) semiconductors exhibit strong excitonic effects and hold promise for optical and optoelectronic applications. Yet, electron doping of TMDs leads to the conversion of neutral excitons into neg…