195 citations · 990 across the 30 of their papers we have counts for
30 papers
X-ray driven displacive excitation of coherent phonons
Oleg Dogadov, Remi Claude, Christoph Emeis +29
Modulating electron-phonon coupling offers a route to control structural displacements and tune material functionality. Valence-to-conduction band transitions, however, provide lim…
Metaphotonic Catalysis: Amorphous silicon metasurfaces encode photochemical activity
Elif Nur Dayi, Priscila Vensaus, Milad Sabzehparvar +3
Solar-to-fuel conversion can benefit from photoelectrodes with engineered light-matter interactions, yet most nanostructured designs provide limited control over the spatial and sp…
Photostationary Lifshitz transition in High Tc superconductor Bi2Sr2CaCu2O8+δ
Ji Dai, Lukas Hellbrück, Michele Puppin +12
To date, controlling the steady-state electronic band structure in high-Tc cuprate superconductors has been achieved primarily through chemical doping or magnetic fields. Here, we…
Excitons in WSe2 time-resolved ARPES: particle or oscillation?
Kai Wu, Michele Puppin, Andrea Marini
The time-resolved angle-resolved photoemission spectra of WSe, a paradigmatic transition metal dichalcogenide, are dominated by a transient signal that, after being initially o…
Impact of a Fano resonance on the measured transition time scale in solid state photoemission
Fei Guo, Dmitry Usanov, Eduardo B. Guedes +3
Fundamental quantum transition time scales are accessible through the spin polarization of photoelectrons coming from initially spin-degenerate states for solid-state materials . I…
Dependency of quantum time scales on symmetry
Fei Guo, Dmitrii Usanov, Eduardo B. Guedes +7
Although used extensively in everyday life, time is one of the least understood quantities in physics, especially on the level of quantum mechanics. Here we use an experimental met…
Shot-to-shot acquisition ultrafast electron diffraction
Remi Claude, Michele Puppin, Bruce Weaver +3
We demonstrate a novel shot-to-shot acquisition method for optical pump - keV electron energy probe in ultrafast scattering experiments. We integrate a phase-locked acquisition sch…
Light-induced renormalization of the band structure of chiral tellurium
G. Gatti, N. Tancogne-Dejean, H. Hübener +11
Chirality in tellurium derives from a Peierls distortion driven by strong electron-phonon coupling, making this material a unique candidate for observing a light-induced topologica…
Ultrafast momentum-resolved visualization of the interplay between phonon-mediated scattering and plasmons in graphite
Francesco Barantani, Rémi Claude, Fadil Iyikanat +7
Scattering between individual charges and collective modes in materials governs fundamental phenomena such as electrical resistance, energy dissipation, switching between different…
Real and Reciprocal Space Characterization of the 3-Dimensional Charge Density Wave in Quasi-1-Dimensional CuTe
Fei Guo, Michele Puppin, Lukas Hellbruck +4
Low-dimensional materials are susceptible to electronic instabilities such as charge density waves (CDWs), originating from a divergence in the Lindhard electron response function,…
High-resolution MHz time- and angle-resolved photoemission spectroscopy based on a tunable vacuum ultraviolet source
Lukas Hellbrück, Michele Puppin, Fei Guo +7
Time and angle-resolved photoemission spectroscopy (trARPES) allows direct mapping of the electronic band structure and its dynamic response on femtosecond timescales. Here, we pre…
A set-up for Hard X-ray Time-resolved Resonant Inelastic X-ray Scattering at SwissFEL
Hui-Yuan Chen, Rolf B. Versteeg, Michele Puppin +15
We present a new set up for resonant inelastic hard X-ray scattering at the Bernina beamline of SwissFEL with energy, momentum, and temporal resolution. The compact R=0.5 m Johann-…
EuCdAs: a magnetic semiconductor
D. Santos-Cottin, I. Mohelský, J. Wyzula +18
EuCdAs is now widely accepted as a topological semimetal in which a Weyl phase is induced by an external magnetic field. We challenge this view through firm experimental ev…
Complex topological features of reservoirs shape learning performances in bio-inspired recurrent neural networks
Valeria d'Andrea, Michele Puppin, Manlio De Domenico
Recurrent networks are a special class of artificial neural systems that use their internal states to perform computing tasks for machine learning. One of its state-of-the-art deve…
Atomic-level description of thermal fluctuations in inorganic lead halide perovskites
Oliviero Cannelli, Julia Wiktor, Nicola Colonna +10
The potential of lead-halide perovskites for realistic applications is currently hindered by their limited long-term stability under functional activation. While the role of lattic…
Excited-state band structure mapping
M. Puppin, C. W. Nicholson, C. Monney +10
Angle-resolved photoelectron spectroscopy is an extremely powerful probe of materials to access the occupied electronic structure with energy and momentum resolution. However, it r…
Coherent Modulation of Quasiparticle Scattering Rates in a Photoexcited Charge-Density-Wave System
J. Maklar, M. Schüler, Y. W. Windsor +8
We present a complementary experimental and theoretical investigation of relaxation dynamics in the charge-density-wave (CDW) system TbTe after ultrafast optical excitation. Us…
Quantifying Photoinduced Polaronic Distortions in Inorganic Lead Halide Perovskites Nanocrystals
Oliviero Cannelli, Nicola Colonna, Michele Puppin +16
The development of next generation perovskite-based optoelectronic devices relies critically on the understanding of the interaction between charge carriers and the polar lattice i…
Direct measurement of key exciton properties: energy, dynamics and spatial distribution of the wave function
Shuo Dong, Michele Puppin, Tommaso Pincelli +15
Excitons, Coulomb-bound electron-hole pairs, are the fundamental excitations governing the optoelectronic properties of semiconductors. While optical signatures of excitons have be…
Nonequilibrium Charge-Density-Wave Order Beyond the Thermal Limit
J. Maklar, Y. W. Windsor, C. W. Nicholson +17
The interaction of many-body systems with intense light pulses may lead to novel emergent phenomena far from equilibrium. Recent discoveries, such as the optical enhancement of the…
Light-induced renormalization of the Dirac quasiparticles in the nodal-line semimetal ZrSiSe
G. Gatti, A. Crepaldi, M. Puppin +16
In nodal-line semimetals linearly dispersing states form Dirac loops in the reciprocal space, with high degree of electron-hole symmetry and almost-vanishing density of states near…
Evidence of large polarons in photoemission band mapping of the perovskite semiconductor CsPbBr
M. Puppin, S. Polishchuk, N. Colonna +16
Lead-halide perovskite (LHP) semiconductors are emergent optoelectronic materials with outstanding transport properties which are not yet fully understood. We find signatures of la…
Excited state band mapping and momentum-resolved ultrafast population dynamics in In/Si(111) nanowires investigated with XUV based time- and angle-resolved photoemission spectroscopy
C. W. Nicholson, M. Puppin, A. Lücke +6
We investigate the excited state electronic structure of the model phase transition system In/Si(111) using femtosecond time- and angle-resolved photoemission spectroscopy (trARPES…
Time- and angle-resolved photoemission spectroscopy of solids in the extreme ultraviolet at 500 kHz repetition rate
M. Puppin, Y. Deng, C. W. Nicholson +8
Time- and angle-resolved photoelectron spectroscopy (trARPES) employing a 500 kHz extreme-ultravioled (XUV) light source operating at 21.7 eV probe photon energy is reported. Based…