Quasiparticle lifetimes in adx2−y2superconductor

Quasiparticle Lifetimes and the Conductivity Scattering Rate

We compute the single-particle inverse lifetime, along with the conductivity-derived scattering rate, for a metallic system in an s-wave superconducting state. When both electron-phonon and electron-impurity scattering are included , we find that while these scattering rates are in qualitative agreement, in general quantitative agreement is lacking. We also derive results for the quasiparticle ...

Quasiparticle Lifetimes in Superconductors: Relationship with the Conductivity Scattering Rate

We compute the single particle inverse lifetime, evaluated in the superconducting state. Within the BCS framework, the calculation can be done nonperturbatively, i.e. poles can be found well away from the real axis. We find that perturbative calculations are in good agreement with these results, even for non-zero impurity scattering. With electron-phonon scattering added to the problem, we use ...

Theoretical study of quasiparticle inelastic lifetimes as applied to aluminum

I. A. Nechaev,1,* I. Yu. Sklyadneva,1,2 V. M. Silkin,3 P. M. Echenique,1,3 and E. V. Chulkov1,3 1Donostia International Physics Center (DIPC), P. de Manuel Lardizabal, 4, 20018, San Sebastián, Basque Country, Spain 2Institute of Strength Physics and Materials Science, Prospekt Academicheski 2/1, 634021, Tomsk, Russia 3Departamento de Física de Materiales, Facultad de Ciencias Químicas, UPV/EHU ...

Anisotropy of Quasiparticle Lifetimes and the Role of Disorder for Ultrafast Electron Dynamics in Graphite

Femtosecond time-resolved photoemission of photoexcited electrons in highly oriented pyrolytic graphite (HOPG) provides strong evidence for anisotropies of quasiparticle (QP) lifetimes. Indicative of such anisotropies is a pronounced anomaly in the energy dependence of QP lifetimes between 1.1 eV and 1.5 eV – the vicinity of a saddle point in the graphite bandstructure. This is supported by rec...

Quasiparticle lifetimes in magnesium clusters modeled by self-consistent GW calculations