Publication
Evidence of a coupled electron-phonon liquid in NbGe2
Publications associées (66)
Phonons, electron-phonon coupling and charge transport in low-dimensional materials
Over the past few decades, nanostructures have garnered significant attention due to their potential for embodying new physical paradigms and delivering cutting-edge technological applications. Dimensionality strongly affects the vibrational, electron-phon ...
EPFL2023Polarons free from many-body self-interaction in density functional theory
Alfredo Pasquarello, Stefano Falletta
We develop a unified theoretical framework encompassing one-body and many-body forms of self-interaction. We find an analytic expression for both the one-body and the many-body self-interaction energies, and quantitatively connect the two expressions throu ...
2022Evidence for a spin acoustic surface plasmon from inelastic atom scattering
Closed-shell atoms scattered from a metal surface exchange energy and momentum with surface phonons mostly via the interposed surface valence electrons, i.e., via the creation of virtual electron-hole pairs. The latter can then decay into surface phonons v ...
2021Development of a novel two-phase flow solver for nuclear reactor analysis: algorithms, verification and implementation in OpenFOAM
Andreas Pautz, Carlo Fiorina, Stefan Radman
A porous medium-based representation of nuclear reactors and complex engineering systems more in general can significantly reduce simulation and modelling costs, while preserving a reasonable degree of accuracy via regime map-based correlations for modelli ...
2021Tomographic reconstruction of the runaway distribution function in TCV using multispectral synchrotron images
Basil Duval, Joan Decker, Umar Sheikh, Artur Perek, Gergely Papp
Synchrotron radiation observed in a quiescent Tokamak a Configuration Variable (TCV) runaway discharge is studied using filtered camera images targeting three distinct wavelength intervals. Through the tomographic simultaneous algebraic reconstruction tech ...
IOP PUBLISHING LTD2021Interventions for Softening Can Lead to Hardening of Opinions: Evidence from a Randomized Controlled Trial
Robert West, Andreas Oliver Spitz, Ahmad Abu-Akel
Motivated by the goal of designing interventions for softening polarized opinions on the Web, and building on results from psychology, we hypothesized that people would be moved more easily towards opposing opinions when the latter were voiced by a celebri ...
ASSOC COMPUTING MACHINERY2021Sondheimer oscillations as a probe of non-ohmic flow in WP2 crystals
Philip Johannes Walter Moll, Matthias Carsten Putzke, Yi-Chiang Sun, Chunyu Guo, Jonas De Jesus Diaz Gomez, Maarten Ruud van Delft, Jacopo Oswald
As conductors in electronic applications shrink, microscopic conduction processes lead to strong deviations from Ohm's law. Depending on the length scales of momentum conserving (l(MC)) and relaxing (l(MR)) electron scattering, and the device size (d), cur ...
NATURE PORTFOLIO2021Spatio-temporal shaping of a free-electron wave function via coherent light-electron interaction
Fabrizio Carbone, Giovanni Maria Vanacore, Ivan Madan
The past decade has witnessed a quantum revolution in the field of computation, communication and materials investigation. A similar revolution is also occurring for free-electron based techniques, where the classical treatment of a free electron as a poin ...
SPRINGERNATURE2020Terahertz surface modes and electron-phonon coupling on Bi2Se3(111)
We present a combined experimental and theoretical study of the surface vibrational modes of the topological insulator Bi2Se3 with particular emphasis on the low-energy region below 10 meV that has been difficult to resolve experimentally. By applying inel ...
AMER PHYSICAL SOC2020Momentum space CFT correlators for Hamiltonian truncation
We consider Lorentzian CFT Wightman functions in momentum space. In particular, we derive a set of reference formulas for computing two- and three-point functions, restricting our attention to three-point functions where the middle operator (corresponding ...
2020