5 papers
Excitonic effects in energy loss spectra of freestanding graphene
Alberto Guandalini, Ryosuke Senga, Yung-Chang Lin +8
In this work we perform electron energy-loss spectroscopy (EELS) of freestanding graphene with high energy and momentum resolution to disentangle the quasielastic scattering from t…
Electron-phonon interaction and phonons in 2d doped semiconductors
Francesco Macheda, Thibault Sohier, Paolo Barone +1
Electron-phonon interaction and phonon frequencies of doped polar semiconductors are sensitive to long-range Coulomb forces and can be strongly affected by screening effects of fre…
Probing enhanced electron-phonon coupling in graphene by infrared resonance Raman spectroscopy
Tommaso Venanzi, Lorenzo Graziotto, Francesco Macheda +16
We report on resonance Raman spectroscopy measurements with excitation photon energy down to 1.16 eV on graphene, to study how low-energy carriers interact with lattice vibrations.…
Electron-phonon interaction and longitudinal-transverse phonon splitting in doped semiconductors
Francesco Macheda, Paolo Barone, Francesco Mauri
We study the effect of doping on the electron-phonon interaction and on the phonon frequencies in doped semiconductors, taking into account the screening in presence of free carrie…
Giant piezoelectricity driven by Thouless pump in conjugated polymers
Stefano Paolo Villani, Marco Campetella, Paolo Barone +1
Piezoelectricity of organic polymers has attracted increasing interest because of several advantages they exhibit over traditional inorganic ceramics. While most organic piezoelect…