Premium
Exchange Interactions and Local Field Effects in Exciton Theory
Author(s) -
Stolz H.,
Zimmermann R.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220530134
Subject(s) - exciton , local field , formalism (music) , bethe–salpeter equation , condensed matter physics , exchange interaction , physics , field (mathematics) , electron , quantum mechanics , quantum electrodynamics , mathematical physics , mathematics , meson , pure mathematics , art , musical , ferromagnetism , visual arts
The role of local field corrections in the linear response of the crystal electron system is investigated using Green's function technique. The macroscopic conductivity can be calculated directly from the solution of a Bethe‐Salpeter equation containing in addition to the screened direct an unscreened exchange interaction, the latter being of pure local field type. The formalism is applied to the Frenkel exciton theory.