6533b82afe1ef96bd128cb08
RESEARCH PRODUCT
Quasi-particle and plasmaron properties in the electron gas
K. J. LezuoK. J. Lezuosubject
PhysicsNuclear and High Energy PhysicsCondensed matter physicsQuantum electrodynamicsDegenerate energy levelsContinuum (design consultancy)Vertex (curve)QuasiparticleFunction (mathematics)PlasmaronFermi gasPlasmondescription
The self-energy function of the degenerate electron gas is studied in an approximation which uses the dielectric function proposed by Singwi, Tosi, Land and Sjolander, and neglects the corresponding vertex corrections. Two contributions to the self-energy are distinguished which arise from the plasmon pole and the particle-hole continuum respectively. Comparison of the results is made with the analogous approximation to the self-energy which uses the RPA dielectric function, and with a further, simplified approximation. Subsequently the properties of the usual quasi-particle and of the plasmaron are calculated. Nummerically, the most significant effect found is a 25% reduction of the plasmaron damping over the RPA result. For the usual quasiparticle the damping rate is found to be increased by some 10% and the spectral weight reduced by 6%.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1972-06-01 | Zeitschrift für Physik A Hadrons and nuclei |