Contributions to the second order dielectric response of an electron liquid

✍ Scribed by Martina E. Bachlechner; Helga M. Miesenboeck; Wilhelm Macke

• Publisher: Elsevier Science
• Year: 1988
• Weight: 569 KB
• Volume: 150
• Category: Article
• ISSN: 0378-4363
• DOI: 10.1016/0378-4363(88)90073-3

✦ Synopsis

The dielectric response function x of a uniform electron gas is investigated up to the second order of the Coulomb interaction with different methods. When examining all polarisation diagrams with two interaction lines, it is confirmed that previous work in the Green's function formalism does not contain all second order processes and the importance of the corrections is pointed out. It is further shown, how the evaluation of x with Green's function can be greatly simplified when taking into account the symmetry of the expressions.