2 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.supr-con2025
Dispersion of plasmons in three-dimensional superconductors
T. Repplinger, S. Klimin, M. Gélédan +2
We study the plasma branch of an homogeneous three-dimensional electron gas in an -wave superconducting state. We focus on the regime where the plasma frequency is compar…