The advent of pump-probe spectroscopy techniques paved the way to the exploration of
ultrafast dynamics of electrons and phonons in crystalline solids. Following photo-absorption …

Polarons are quasiparticles that emerge from the interaction of fermionic particles with
bosonic fields. In crystalline solids, polarons form when electrons and holes become …

Ab initio calculations of the phonon-induced band structure renormalization are currently
based on the perturbative Allen-Heine theory and its many-body generalizations. These …

The role of X-ray based electron spectroscopies in determining chemical, electronic, and
magnetic properties of solids has been well-known for several decades. A powerful …

We present a theoretical framework to describe polarons from first principles within a many-
body Green's function formalism. Starting from a general electron-phonon Hamiltonian, we …

Although plasmons and phonons are the collective excitations that govern the low-energy
physics of doped semiconductors, their nonadiabatic hybridization and mutual screening …

We develop a theoretical and computational framework to study polarons in semiconductors
and insulators from first principles. Our approach provides the formation energy, excitation …

This review outlines fundamental principles, instrumentation, and capabilities of angle-
resolved photoemission spectroscopy (ARPES) and microscopy. We will present how high …

We present a detailed analysis of the electronic properties of graphene/Eu/Ni (111). By
using angle-and spin-resolved photoemission spectroscopy and ab initio calculations, we …

Interaction between electrons and phonons in solids is a key effect defining the physical
properties of materials, such as electrical and thermal conductivity. In transition metal …