86 citations · 155 across the 17 of their papers we have counts for
17 papers
Dark exciton signatures in the infrared transient absorption of MoS monolayer
Tian-Xiang Qian, Marco D'Alessandro, Claudio Attaccalite +3
Dark excitons play a central role in the nonequilibrium dynamics of two-dimensional semiconductors, but remain difficult to characterize. Transient-absorption experiments, with pro…
Efficient nonequilibrium electron dynamics from first-principles: leveraging Koopmans spectral functionals and Wannier localization
Giovanni Cistaro, Miguel Sá, Davide Sangalli +2
We present an efficient first-principles approach for simulating the nonequilibrium electron dynamics in extended systems beyond the linear regime. The method combines Koopmans-com…
The Frequency-Dependent Spin Contribution to the Magnetoelectric Tensor of CrO: A First-Principles Study
Torsten Geirsson, Davide Sangalli, Alberto García-Cristóbal +1
The magnetoelectric (ME) effect provides a promising pathway for controlling magnetic functionalities using electric fields. While first-principles methods for the static linear ME…
Extreme-ultraviolet optical response of atomically-thin molybdenum disulfide
G. Fiorentini, N. Di Palo, G. Inzani +18
We report multi-angle reflectivity measurements in the extreme-ultraviolet (XUV) range for mono- and bilayer MoS on a SiN substrate. Using a single-sheet 2D conductivit…
Nonequilibrium dynamics of high energy transitions in monolayer WSe
Oleg Dogadov, Jorge Cervantes-Villanueva, Nicholas Olsen +6
High-energy optical transitions in monolayer transition-metal dichalcogenides exhibit characteristics that are markedly distinct from those of lower-lying band-edge excitons. These…
Coherent Ultrafast Excitonic Oscillations in Monolayer WS
Jorge Cervantes-Villanueva, Alberto García-Cristóbal, Davide Sangalli +1
Monolayer transition metal dichalcogenides are a suitable platform for studying excitonic coherence in the light-matter coupling regime. We present an ab initio time-dependent GW-B…
Symmetries of excitons
Muralidhar Nalabothula, Davide Sangalli, Fulvio Paleari +2
Excitons, bound electron-hole pairs, are responsible for strong optical resonances near the bandgap in low-dimensional materials and wide-bandgap insulators. Although current ab in…
Solvers for the Hermitian and the pseudo-Hermitian Bethe-Salpeter equation in the Yambo code: Implementation and Performance
Petru Milev, Blanca Mellado-Pinto, Muralidhar Nalabothula +8
We analyze the performance of two strategies in solving the structured eigenvalue problem deriving from the Bethe-Salpeter equation (BSE) in condensed matter physics. The BSE matri…
Magnons in chromium trihalides from \emph{ab initio} Bethe-Salpeter equation
Ali Esquembre-Kučukalić, Khoa B. Le, Alberto García-Cristóbal +3
Chromium trihalides (CrX, with ) are layered ferromagnetic materials with rich physics and possible applications. Their structure consists of magnetic Cr atoms…
Magnon-phonon interactions from first principles
Khoa B. Le, Ali Esquembre-Kucukalic, Hsiao-Yi Chen +6
Modeling spin-wave (magnon) dynamics in novel materials is important to advance spintronics and spin-based quantum technologies. The interactions between magnons and lattice vibrat…
Unveiling exciton formation: exploring the early stages in time, energy and momentum domain
Valentina Gosetti, Jorge Cervantes-Villanueva, Selene Mor +9
Resolving the early-stage dynamics of exciton formation following non-resonant photoexcitation in time, energy, and momentum is quite challenging due to their inherently fast times…
Excitonic response in TMD heterostructures from first-principles: impact of stacking, twisting, and interlayer distance
R. Reho, A. R. Botello-Méndez, D. Sangalli +2
Van der Waals heterostructures of two-dimensional transition metal dichalcogenides provide a unique platform to engineer optoelectronic devices tuning their optical properties via…
Detection of a coherent excitonic state in the layered semiconductor BiI
Valentina Gosetti, Jorge Cervantes-Villanueva, Davide Sangalli +6
The measurement and manipulation of the coherent dynamics of excitonic states constitute a forefront research challenge in semiconductor optics and in quantum coherence-based proto…
Physics of excitons in layered BiI. Effects of dimensionality and crystal anisotropy
Jorge Cervantes-Villanueva, Fulvio Paleari, Alberto García-Cristóbal +2
We carry out a detailed theoretical study of the electronic and optical properties of bulk and monolayer bismuth triiodide (BiI), a layered metal halide, using the ab initio…
Excitons and carriers in transient absorption and time-resolved ARPES spectroscopy: an abinitio approach
D. Sangalli
I present a fully abinitio scheme to model transient spectroscopy signals in presence of strongly bound excitons. Using LiF as a prototype material, I show that the scheme is able…
Photoinduced coherent modulation of an excitonic resonance via coupling with coherent optical phonons
Selene Mor, Valentina Gosetti, Alejandro Molina-Sánchez +7
The coupling of excitons with atomic vibrations plays a pivotal role on the nonequilibrium optical properties of layered semiconductors. However, addressing the dynamical interacti…
First-principles approach to excitons in time-resolved and angle-resolved photoemission spectra
E. Perfetto, D. Sangalli, A. Marini +1
We show that any {\em quasi-particle} or GW approximation to the self-energy does not capture excitonic features in time-resolved (TR) photoemission spectroscopy. In this work we p…