Claudio Giannetti
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View article: Energy-density-driven ultrafast electronic excitations in a cuprate superconductor
Energy-density-driven ultrafast electronic excitations in a cuprate superconductor Open
Controlling nonequilibrium dynamics in quantum materials requires ultrafast probes with spectral selectivity. We report femtosecond reflectivity measurements on the cuprate superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ using free-electron l…
View article: Direct measurement of coherent nodal and antinodal dynamics in underdoped Bi-2212
Direct measurement of coherent nodal and antinodal dynamics in underdoped Bi-2212 Open
The physics of strongly correlated materials is deeply rooted in electron interactions and their coupling to low-energy excitations. Unraveling the competing and cooperative nature of these interactions is crucial for connecting microscopi…
View article: Selective electron-phonon coupling strength from nonequilibrium optical spectroscopy: The case of MgB$_2$
Selective electron-phonon coupling strength from nonequilibrium optical spectroscopy: The case of MgB$_2$ Open
The coupling between quasiparticles and bosonic excitations rules the energy transfer pathways in condensed matter systems. The possibility of inferring the strength of specific coupling channels from their characteristic time scales measu…
View article: Fate of Optical Excitons in FAPbI<sub>3</sub> Nanocube Superlattices
Fate of Optical Excitons in FAPbI<sub>3</sub> Nanocube Superlattices Open
Understanding the nature of the photoexcitation and ultrafast charge dynamics pathways in organic halide perovskite nanocubes and their aggregation into superlattices is key for potential applications as tunable light emitters, photon-harv…
View article: Impact of MoS<sub>2</sub> Monolayers on the Thermoelastic Response of Silicon Heterostructures
Impact of MoS<sub>2</sub> Monolayers on the Thermoelastic Response of Silicon Heterostructures Open
Understanding the thermoelastic response of a nanostructure is crucial for the choice of materials and interfaces in electronic devices with improved and tailored transport properties at the nanoscale. Here, we show how the deposition of a…
View article: Mott resistive switching initiated by topological defects
Mott resistive switching initiated by topological defects Open
Avalanche resistive switching is the fundamental process that triggers the sudden change of the electrical properties in solid-state devices under the action of intense electric fields[1]. Despite its relevance for information processing, …
View article: Detection of a Coherent Excitonic State in the Layered Semiconductor BiI<sub>3</sub>
Detection of a Coherent Excitonic State in the Layered Semiconductor BiI<sub>3</sub> Open
The measurement and manipulation of the coherentdynamics of excitonic states constitute a forefront research challenge insemiconductor optics and quantum-coherence-based protocols foroptoelectronic technologies. Layered semiconductors have…
View article: Effect of Photoinduced Screening on the Spectroscopic Signature of Exciton–Phonon Coupling
Effect of Photoinduced Screening on the Spectroscopic Signature of Exciton–Phonon Coupling Open
The light-mediated interaction of fermionic and bosonic\nexcitations\ngoverns the optoelectronic properties of condensed matter systems.\nIn photoexcited semiconductors, the coupling of electron–hole\npairs (excitons) to coherent optical p…
View article: Mott resistive switching initiated by topological defects
Mott resistive switching initiated by topological defects Open
Resistive switching is the fundamental process that triggers the sudden change of the electrical properties in solid-state devices under the action of intense electric fields. Despite its relevance for information processing, ultrafast ele…
View article: Optical Time-Resolved Microscopy on Few-Atoms-Thick Materials
Optical Time-Resolved Microscopy on Few-Atoms-Thick Materials Open
sponsorship: G.F. acknowledges financial support from the MIUR - PRIN 2017 grant in the frame of the aSTAR project (2017RKWTMY_003). Universita Cattolica del Sacro Cuore supported this work through D.3.1 and D.2.2 grants. J.H. acknowledges…
View article: The fate of optical excitons in FAPbI3 nanocube superlattices
The fate of optical excitons in FAPbI3 nanocube superlattices Open
Understanding the nature of the photoexcitation and ultrafast charge dynamics pathways in organic halide perovskite nanocubes and their aggregation into superlattices is key for the potential applications as tunable light emitters, photon …
View article: Kink in cuprates: the role of the low-energy density of states
Kink in cuprates: the role of the low-energy density of states Open
The 40-70 meV band-structure renormalization (so-called kink) in high-temperature cuprate superconductors - which has been mainly interpreted in terms of electron-boson coupling - is observed to be strongly suppressed both above the superc…
View article: Detection of a coherent excitonic state in the layered semiconductor BiI$_{3}$
Detection of a coherent excitonic state in the layered semiconductor BiI$_{3}$ Open
The measurement and manipulation of the coherent dynamics of excitonic states constitute a forefront research challenge in semiconductor optics and in quantum coherence-based protocols for optoelectronic technologies. Layered semiconductor…
View article: Halide Perovskite Artificial Solids as a New Platform to Simulate Collective Phenomena in Doped Mott Insulators
Halide Perovskite Artificial Solids as a New Platform to Simulate Collective Phenomena in Doped Mott Insulators Open
The development of quantum simulators, artificial platforms where the predictions of many-body theories of correlated quantum materials can be tested in a controllable and tunable way, is one of the main challenges of condensed matter phys…
View article: Dynamics of non-thermal states in optimally-doped $Bi_2Sr_2Ca_{0.92}Y_{0.08}Cu_2O_{8+δ}$ revealed by mid-infrared three-pulse spectroscopy
Dynamics of non-thermal states in optimally-doped $Bi_2Sr_2Ca_{0.92}Y_{0.08}Cu_2O_{8+δ}$ revealed by mid-infrared three-pulse spectroscopy Open
In the cuprates, the opening of a d-wave superconducting (SC) gap is accompanied by a redistribution of spectral weight at energies two orders of magnitude larger than this gap. This indicates the importance to the pairing mechanism of on-…
View article: Halide perovskite artificial solids as a new platform to simulate collective phenomena in doped Mott insulators
Halide perovskite artificial solids as a new platform to simulate collective phenomena in doped Mott insulators Open
The development of Quantum Simulators, artificial platforms where the predictions of many-body theories of correlated quantum materials can be tested in a controllable and tunable way, is one of the main challenges of condensed matter phys…
View article: Coherent control of the orbital occupation driving the insulator-to-metal Mott transition in V$_2$O$_3$
Coherent control of the orbital occupation driving the insulator-to-metal Mott transition in V$_2$O$_3$ Open
Managing light-matter interactions on timescales faster than the loss of electronic coherence is key for achieving full quantum control of the final products in solid-solid transformations. In this work, we demonstrate coherent electronic …
View article: Coherent control of the orbital occupation driving the insulator-to-metal Mott transition in V$_2$O$_3$
Coherent control of the orbital occupation driving the insulator-to-metal Mott transition in V$_2$O$_3$ Open
Managing light-matter interactions on timescales faster than the loss of electronic coherence is key for achieving full quantum control of the final products in solid-solid transformations. In this work, we demonstrate coherent electronic …
View article: Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor
Enhanced charge density wave coherence in a light-quenched, high-temperature superconductor Open
Superconductivity and charge density waves (CDWs) are competitive, yet coexisting, orders in cuprate superconductors. To understand their microscopic interdependence, a probe capable of discerning their interaction on its natural length an…
View article: Ultrafast Photoacoustic Nanometrology of InAs Nanowires Mechanical Properties
Ultrafast Photoacoustic Nanometrology of InAs Nanowires Mechanical Properties Open
InAs nanowires are emerging as go-to materials in avariety of applications ranging from optoelectronics to nano-electronics, yet a consensus on their mechanical properties is stilllacking. The mechanical properties of wurtzite InAs nanowir…
View article: Dataset for "Enhanced charge density wave coherence in a light-quenched high temperature superconductor"
Dataset for "Enhanced charge density wave coherence in a light-quenched high temperature superconductor" Open
Dataset for "Enhanced charge density wave coherence in a light-quenched high temperature superconductor"
View article: Dataset for "Enhanced charge density wave coherence in a light-quenched high temperature superconductor"
Dataset for "Enhanced charge density wave coherence in a light-quenched high temperature superconductor" Open
Dataset for "Enhanced charge density wave coherence in a light-quenched high temperature superconductor"
View article: Photoinduced modulation of the excitonic resonance via coupling with coherent phonons in a layered semiconductor
Photoinduced modulation of the excitonic resonance via coupling with coherent phonons in a layered semiconductor Open
The coupling of excitons with atomic vibrations plays a pivotal role on the\nnonequilibrium optical properties of layered semiconductors. However,\naddressing the dynamical interaction between excitons and phonons represents a\nhard task b…
View article: Nanoscale self-organisation in Mott insulators: a richness in disguise
Nanoscale self-organisation in Mott insulators: a richness in disguise Open
Mott transitions in real materials are first order and almost always associated with lattice distortions, both features promoting the emergence of nanotextured phases. This nanoscale self-organization creates spatially inhomogeneous region…
View article: Analytical model of the acoustic response of nanogranular films adhering to a substrate
Analytical model of the acoustic response of nanogranular films adhering to a substrate Open
A 1D mechanical model for nanogranular films, based on a structural\ninterface, is here presented. The analytical dispersion relation for the\nfrequency and lifetimes of the acoustics breathing modes is obtained in terms\nof the interface …