Premium
Dynamic Local Field Corrections for Two‐Component Plasmas
Author(s) -
Wierling A.,
Fortmann C.,
Röpke G.
Publication year - 2009
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200910080
Subject(s) - physics , ansatz , local field , plasma , electron , component (thermodynamics) , field (mathematics) , plasmon , collision frequency , quantum electrodynamics , dispersion relation , limit (mathematics) , scattering , fermi gas , electron scattering , atomic physics , computational physics , quantum mechanics , condensed matter physics , mathematical analysis , mathematics , pure mathematics
Two approaches to the dynamic local field correction for two‐component plasmas are combined with each other. In the first one, we start from the Zubarev approach to linear response theory and use perturbative techniques such as thermodynamic Green's functions. Via this approach, we obtain an approximation for the dynamical collision frequency. In a second approach, we extend the Mermin ansatz to allow for local‐field corrections besides electron‐ion collisions. These are implemented using the recurrence relation technique for electronelectron correlations making use of up‐to‐date results for the interacting electron gas. Exploratory calculations are performed for impurity scattering in an electron gas at T = 0. Static local field corrections due to Farid et al. are employed in describing the interacting electron gas in the static limit. The influence of collisions and correlations on the plasmon dispersion is investigated. Implications for plasma diagnostics are discussed (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)