529 citations · 2.5k across the 38 of their papers we have counts for
9 papers · 1 filter
Strong Coupling of Coherent Phonons to Excitons in Semiconducting Monolayer MoTe
Charles J. Sayers, Armando Genco, Chiara Trovatello +8
The coupling of the electron system to lattice vibrations and their time-dependent control and detection provides unique insight into the non-equilibrium physics of semiconductors.…
Observation of an excitonic Mott transition through ultrafast core--conduction photoemission spectroscopy
Maciej Dendzik, R. Patrick Xian, Enrico Perfetto +19
Time-resolved soft-X-ray photoemission spectroscopy is used to simultaneously measure the ultrafast dynamics of core-level spectral functions and excited states upon excitation of…
Pump driven normal-to-excitonic insulator transition: Josephson oscillations and signatures of BEC-BCS crossover in time-resolved ARPES
E. Perfetto, D. Sangalli, A. Marini +1
We consider a ground-state wide-gap band insulator turning into a nonequilibrium excitonic insulator (NEQ-EI) upon visiting properly selected and physically relevant highly excited…
Ultrafast Charge Migration in XUV Photoexcited Phenylalanine: a First-Principles Study Based on Real-Time Nonequilibrium Green's Functions
E. Perfetto, D. Sangalli, A. Marini +1
The early stage density oscillations of the electronic charge in molecules irradiated by an attosecond XUV pulse takes place on femto- or subfemtosecond timescales. This ultrafast…
An ab-initio approach to describe coherent and non-coherent exciton dynamics
Davide Sangalli, Enrico Perfetto, Gianluca Stefanucci +1
The use of ultra-short laser pulses to pump and probe materials activates a wealth of processes which involve the coherent and non coherent dynamics of interacting electrons out of…
Ab initio calculations of ultra-short carrier dynamics in 2D materials: valley depolarization in single-layer WSe
Alejandro Molina-Sánchez, Davide Sangalli, Ludger Wirtz +1
In single-layer WSe, a paradigmatic semiconducting transition metal dichalcogenide, a circularly polarized laser field can selectively excite electronic transitions in one of t…
Carbon nanotubes as excitonic insulators
Daniele Varsano, Sandro Sorella, Davide Sangalli +4
Fifty years ago Walter Kohn speculated that a zero-gap semiconductor might be unstable against the spontaneous generation of excitons---electron-hole pairs bound together by Coulom…
Anomalous Aharonov--Bohm gap oscillations in carbon nanotubes
Davide Sangalli, Andrea Marini
The gap oscillations caused by a magnetic flux penetrating a carbon nanotube represent one of the most spectacular observation of the Aharonov-Bohm effect at the nano--scale. Our u…
Vibrational properties of sp carbon atomic wires in cluster-assembled carbon films
Giovanni Onida, Nicola Manini, Luca Ravagnan +3
Linear chains made by a single row of sp-hybridized carbon are predicted to display fascinating mechano-electronic properties connected with their termination and stabilization ins…