3 papers
cond-mat.str-el2026
Extending the Feynman variational principle and analytical methods to lattice polarons
S. N. Klimin, J. Tempere, M. Houtput +6
We develop and compare several analytical approximations for the ground state and zero-temperature polaron dispersion in finite-width, nonparabolic conduction bands. The main focus…
cond-mat.mtrl-sci2026
Importance of nonlinear long-range electron-phonon interaction on the carrier mobility of anharmonic halide perovskites
Matthew Houtput, Ingvar Zappacosta, Serghei Klimin +3
The interaction between the electrons and the lattice vibrations in a solid is responsible for various important effects, such as formation of polarons, temperature dependent bandg…
cond-mat.supr-con2025
Nonlinear electron-phonon interactions in Migdal-Eliashberg theory
Ingvar Zappacosta, Matthew Houtput, Jacques Tempere
Superconducting systems based on attractive electron-phonon interactions are the ones which are best understood at a fundamental level. They are well described using Eliashberg the…