115 citations · 340 across the 14 of their papers we have counts for
16 papers
Exchange-controlled quantum beats and entanglement in an exciton--bimodal-cavity system
Cesar E. P. Villegas, Victor P. Brasil, Pedro A. S. Contri +2
We theoretically demonstrate tunable population transfer and entanglement generation in a two-exciton system coupled to a bimodal optical cavity, including an exciton-exciton excha…
An ab initio approach to energy alignment and charge-state prediction of adsorbates on ultrathin insulators
Kevin Lizárraga, Saba Taherpour, Cesar E. P. Villegas +1
The rapid progress of electron spin resonance scanning tunneling microscopy experiments has enabled the manipulation of individual adsorbate spin states physisorbed on ultrathin ox…
Beyond Disinformation: Strategic Misrepresentation across Content, Actors, Processes, and Covertness
Arttu Malkamäki, Daniel Balinhas, Letizia Iannucci +8
This article revisits the widely studied problem of disinformation and related phenomena in online social networks (OSNs) by reframing it as a broader problem of misrepresentation.…
Tunable Interlayer Excitons in Bilayer Graphene Nanoribbons
Alexandre R. Rocha, Rodrigo G. Amorim, Wanderlã L. Scopel +1
Vertically stacked van der Waals structures are promising platforms that enable layer engineering, opening new avenues for the quantum control of elementary excitations, including…
Determining Exciton Binding Energy and Reduced Effective Mass in Metal Tri-Halide Perovskites from Optical and Impedance Spectroscopy Measurements
K. Lizárraga, J. A. Guerra, L. A. Enrique-Moran +5
Accurate determination of the exciton binding energy and reduced effective mass in halide perovskites is of utmost importance for the selective design of optoelectronic devices. Al…
Optical properties of TiS as a novel thin film for single-junction and tandem solar cells
Cesar E. P. Villegas, Enesio Marinho, A. C. Dias +2
Sub-micrometer thin films are promising platforms for emerging flexible photovoltaic devices. Although the current market already produces efficient solar cells, the average wafer…
Screened hydrogen model of excitons in semiconducting nanoribbons
Cesar E. P. Villegas, Alexandre R. Rocha
The optical response of quasi-one-dimensional systems is often dominated by tightly bound excitons, that significantly influence their basic electronic properties. Despite their im…
Photovoltaic efficiency of transition metal dichalcogenides thin films by ab initio excited-state methods
Enesio Marinho, Cesar E. P. Villegas, Pedro Venezuela +1
Transition metal dichalcogenides (TMDCs) have garnered significant interest in optoelectronics, owing to their scalability and thickness-dependent electrical and optical properties…
Many-body effects on the quasiparticle band structure and optical response of single-layer penta-NiN
Enesio Marinho, Cesar E. P. Villegas, Pedro Venezuela +1
We present a comprehensive first-principles study on the optoelectronic properties of the single-layer nickel diazenide (penta-NiN), a recently synthesized Cairo pentagonal 2D…
Efficient hot carrier dynamics in near-infrared photocatalytic metals
Cesar E. P. Villegas, Marina S. Leite, Andrea Marini +1
Photoexcited metals can produce highly-energetic hot carriers whose controlled generation and extraction is a promising avenue for technological applications. While hot carrier dyn…
Phase Transition and Electronic Structure Investigation of MoS-rGO Nanocomposite Decorated with AuNPs
Yunier Garcia-Basabe, Gabriela F. Peixoto, Daniel Grasseschi +5
In this work a simple approach to transform MoS from its metallic (1T' to semiconductor 2H) character via gold nanoparticle surface decoration of a MoS graphene oxide (rGO)…
Ab initio modelling of spin relaxation lengths in disordered graphene nanoribbons†
Wudmir Y. Rojas, Cesar E. P. Villegas, Alexandre R. Rocha
The spin-dependent transport properties of armchair graphene nanoribbons in the presence of extrinsic spin-orbit coupling induced by a random distribution of Nickel adatoms is stud…
Electron-phonon scattering effects on electronic and optical properties of orthorhombic GeS
Cesar E. P. Villegas, A. R. Rocha, A. Marini
Group-VI monochalcogenides are attracting a great deal of attention due to their peculiar anisotropic properties. Very recently, it has been suggested that GeS could act as a promi…
Anomalous temperature dependence of the band-gap in Black Phosphorus
Cesar E. P. Villegas, A. R. Rocha, Andrea Marini
Black Phosphorus (BP) has gained renewed attention due to its singular anisotropic electronic and optical properties that might be exploited for a wide range of technological appli…
Edge phonons in black phosphorus
H. B. Ribeiro, C. E. P. Villegas, D. A. Bahamon +6
Exfoliated black phosphorus has recently emerged as a new two-dimensional crystal that, due to its peculiar and anisotropic crystalline and electronic band structures, may have pot…
Optical spectrum of bottom-up graphene nanoribbons: towards efficient atom-thick excitonic solar cells
Cesar E. P. Villegas, Pedro B. Mendonça, Alexandre Rocha
Recently, atomically well-defined cove-shaped graphene nanoribbons have been obtained using bottom-up synthesis. These nanoribbons have an optical gap in the visible range of the s…