Berlin 2015 – scientific programme
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O: Fachverband Oberflächenphysik
O 67: Electronic Structure Theory: General, Method Development
O 67.3: Poster
Wednesday, March 18, 2015, 18:15–21:00, Poster A
Electron-phonon relaxation times from first principle calculations — •Florian Rittweger1,2, Nicki F. Hinsche1, and Ingrid Mertig1,2 — 1Martin-Luther-Universität, Institut für Physik, Von-Seckendorff-Platz 1, DE-06120 Halle — 2Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, DE-06120 Halle
Electron-phonon interaction (EPI) is usually related to the phenomenon of superconductivity. Besides these studies the influence of the EPI on transport properties became popular in the last years.
While ARPES measurements offer experimental access to the EPI, theoretical approaches are based on the calculation of the electron-phonon matrix elements. The latter leads either to the calculation of the complex electron-phonon self-energy and therefore the renormalization of the electronic band structure or to the estimation of the electron-phonon coupling strength λ and the state-dependent relaxation time τk. The k-dependence of τ enters the Boltzmann equation for the computation of transport properties like the electrical conductivity, thermal conductivity and the thermopower beyond the relaxation time approximation typically used.
We calculate the EPI using linear response density functional perturbation theory and present first results and discussions for simple metals.