86 citations · 218 across the 10 of their papers we have counts for
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Temperature dependence of the charge density from first principles: application to the (222) forbidden reflection in silicon
Jean Paul Nery, Raveena Gupta, Olle Hellman +2
Forbidden reflections (FRs) in X-ray diffraction have inherently weak intensity and have long been studied, in particular in semiconductors like silicon. They serve as sensitive pr…
Beyond Allen-Heine-Cardona: non-perturbative electron-phonon interactions in the linewidths and lineshifts of diamond
Jean Paul Nery, Samuel Longo, Matthieu J. Verstraete
The temperature-dependent band gap of solids is usually computed from the perturbative Allen-Heine-Cardona (AHC) electron-phonon self-energy evaluated on-shell. Extending AHC to ar…
Spectroscopic signatures of nonpolarons : the case of diamond
Joao C. de Abreu, Jean Paul Nery, Matteo Giantomassi +2
Polarons are quasi-particles made from electrons interacting with vibrations in crystal lattices. They derive their name from the strong electron-vibration polar interaction in ion…
Non-perturbative Green's function method to determine the electronic spectral function due to electron-phonon interactions: Application to a graphene model from weak to strong coupling
Jean Paul Nery, Francesco Mauri
In solid state physics, the electron-phonon interaction (EPI) is central to many phenomena. The theory of the renormalization of electronic properties due to EPIs became well estab…
Quasiparticles and phonon satellites in spectral functions of semiconductors and insulators: Cumulants applied to full first principles theory and Fröhlich polaron
Jean Paul Nery, Philip B. Allen, Gabriel Antonius +3
The electron-phonon interaction causes thermal and zero-point motion shifts of electron quasiparticle (QP) energies . Other consequences of interactions, visible in angle-r…
Low temperature-semiconductor band gap thermal shifts: T^4 shifts from ordinary acoustic and T^2 from piezoacoustic coupling
Philip B. Allen, Jean Paul Nery
At low temperature T, the experimental gap of silicon decreases as E_g(T)=E_g(0)-AT^4. The main reason is electron-phonon renormalization. The physics behind the T^4-power law is m…
Influence of Fröhlich polaron coupling on renormalized electron bands in polar semiconductors. Results for zincblende GaN
Jean Paul Nery, Philip B. Allen
\ni We develop a simple method to study the zero-point and thermally renormalized electron energy for the conduction band minimum or va…